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# Index to OEIS: Section Ab

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# Index to OEIS: Section Ab

- This is a section of the Index to the
**OEIS®**. - For further information see the main
**Index to OEIS**page. - Please read Index: Instructions For Updating Index to OEIS before making changes to this page.
- If you did not find what you were looking for in this Index, you can always search the database for a particular word or phrase.
- Full list of sections:

[
Aa |
**Ab** |
Al |
Am |
Ap |
Ar |
Ba |
Be |
Bi |
Bl |
Bo |
Br |
Ca |
Ce |
Ch |
Cl |
Coa |
Coi |
Com |
Con |
Cor |
Cu |
Cy |
Da |
De |
Di |
Do |
Ea |
Ed |
El |
Eu |
Fa |
Fe |
Fi |
Fo |
Fu |
Ga |
Ge |
Go |
Gra |
Gre |
Ha |
He |
Ho |
Ia |
In |
J |
K |
La |
Lc |
Li |
Lo |
Lu |
M |
Mag |
Map |
Mat |
Me |
Mo |
Mu |
N |
Na |
Ne |
Ni |
No |
Nu |
O |
Pac |
Par |
Pas |
Pea |
Per |
Ph |
Poi |
Pol |
Pos |
Pow |
Pra |
Pri |
Pro |
Ps |
Qua |
Que |
Ra |
Rea |
Rel |
Res |
Ro |
Ru |
Sa |
Se |
Si |
Sk |
So |
Sp |
Sq |
St |
Su |
Sw |
Ta |
Te |
Th |
To |
Tra |
Tri |
Tu |
U |
V |
Wa |
We |
Wi |
X |
Y |
Z |
1 |
2 |
3 |
4
]

##### *abc* conjecture, sequences related to :

- A120498 (numbers C from the
*abc*conjecture), A216323 (b in triples with a=1), A216328 (b in triples with a = 2). - list of "abc-hits": A225426 (the triples), A130510, A130511, A130512 (values of c, a, rad(abc)), A225425 (# "abc-hits" with c < 10^n).
- search for records of the merit function: (admitting only specific C values)
- less specifically related: A007947 (radical), A001220 (Wieferich primes),
- A002587 (largest prime factor of 2^n + 1), A010846 (# smaller numbers with no other prime factors),
- A191100 ([rad(ABC)]/C for A=3, C=A+B), A190846 (same for A=1), A191093 (same for A=2)
- A039678 (
*a*such that*a*^(*p*-1)-1 is divisible by*p*^2), A147803 (m coprime to 5 minimizing A007947(m(5^n-m))), A147804 (m coprime to 7 minimizing A007947(m(7^n-m))), A185103 (Smallest k > 1 such that k^(n-1) == 1 (mod n^2))

- maxima and minima of rad
*(m(n-m)n)*: A147298 (minima), A147300 (m for minima). - p-smooth {n,n+1}: A085152 (p=5), A085153 (p=7), A002071 (# p-smooth pairs)

abelian numbers: A051532

absolute primes: see primes, absolute

abundance: see abundancy

##### abundancy , sequences related to :

- abundancy: A033880*, A033879, A005579, A005347, A005580, A033881, A033882
- abundancy: see also deficiency
- abundant numbers: A002093, A002182, A005101*, A091191
- abundant numbers: consecutive: A094268
- abundant numbers: odd: A005231*, A006038, A064001
- abundant numbers: see also A004394

##### Ackermann function, sequences related to :

- Ackermann function: A001695, A046859, A014221
- Ackermann function: see also sequences which grow too rapidly to have their own entries

acyclic digraphs, see digraphs, acyclic

##### add 1, multiply by 1, add 2, multiply by 2, etc., sequences related to :

##### add m then reverse digits, sequences related to

##### addition chains, sequences related to :

##### additive bases , sequences related to :

- additive bases: A004133, A004135, A004136
- additive bases: see also Golomb rulers

##### additive sequences sequences related to :

- additive sequences (00): definition: a(n*m) = a(n) + a(m) if GCD(n,m) = 1
- additive sequences (01): completely additive A001222, A001414, A007814, A007949, A048675, A056239, A067666, A076649,
- additive sequences (02): completely additive A078458, A078908, A078909, A112765, A113177
- additive sequences (03): A001221, A005063-A005085, A005087-A005091, A005094, A008472, A008474,
- additive sequences (04): A008475, A008476, A046660, A052331, A055631, A056169, A056170, A059841,
- additive sequences (05): A064372, A064415, A066328, A079978, A080256, A081403, A087207, A090885,
- additive sequences (06): A106490, A106492, A113178, A113222, A115357, A121262, A086275
- additive sequences (07): completely additive fractions: A083345/A083346
- additive sequences (08): additive fractions: A028235/A007947, A028236/A000027
- additive sequences (09): totally additive: see additive sequences, completely additive
- additive sequences (10): strongly additive: see additive sequences, completely additive

Aho-Sloane paper: see entry for a(n+1)=a(n)^2 + ...

Airey's converging factor: A001662

Aitken's array: A011971*

- This is a section of the Index to the
**OEIS®**. - For further information see the main
**Index to OEIS**page. - Please read Index: Instructions For Updating Index to OEIS before making changes to this page.
- If you did not find what you were looking for in this Index, you can always search the database for a particular word or phrase.
- Full list of sections:

[
Aa |
**Ab** |
Al |
Am |
Ap |
Ar |
Ba |
Be |
Bi |
Bl |
Bo |
Br |
Ca |
Ce |
Ch |
Cl |
Coa |
Coi |
Com |
Con |
Cor |
Cu |
Cy |
Da |
De |
Di |
Do |
Ea |
Ed |
El |
Eu |
Fa |
Fe |
Fi |
Fo |
Fu |
Ga |
Ge |
Go |
Gra |
Gre |
Ha |
He |
Ho |
Ia |
In |
J |
K |
La |
Lc |
Li |
Lo |
Lu |
M |
Mag |
Map |
Mat |
Me |
Mo |
Mu |
N |
Na |
Ne |
Ni |
No |
Nu |
O |
Pac |
Par |
Pas |
Pea |
Per |
Ph |
Poi |
Pol |
Pos |
Pow |
Pra |
Pri |
Pro |
Ps |
Qua |
Que |
Ra |
Rea |
Rel |
Res |
Ro |
Ru |
Sa |
Se |
Si |
Sk |
So |
Sp |
Sq |
St |
Su |
Sw |
Ta |
Te |
Th |
To |
Tra |
Tri |
Tu |
U |
V |
Wa |
We |
Wi |
X |
Y |
Z |
1 |
2 |
3 |
4
]