login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A290979 The arithmetic function v_2(n,6). 0
0, 1, 1, 1, 2, 1, 2, 3, 2, 2, 4, 2, 2, 5, 4, 3, 6, 3, 5, 7, 4, 4, 8, 5, 4, 9, 7, 5, 10, 5, 8, 11, 6, 7, 12, 6, 6, 13, 10, 7, 14, 7, 11, 15, 8, 8, 16, 8, 10, 17, 13, 9, 18, 11, 14, 19, 10, 10, 20, 10, 10, 21, 16, 13, 22, 11, 17, 23, 14, 12, 24, 12, 12, 25, 19, 14, 26 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,5

REFERENCES

J. Butterworth, Examining the arithmetic function v_g(n,h). Research Papers in Mathematics, B. Bajnok, ed., Gettysburg College, Vol. 8 (2008).

LINKS

Table of n, a(n) for n=2..78.

Bela Bajnok, Additive Combinatorics: A Menu of Research Problems, arXiv:1705.07444 [math.NT], May 2017. See Table in Section 1.6.1.

MATHEMATICA

v[g_, n_, h_] := (d = Divisors[n]; Max[(Floor[(d - 1 - GCD[d, g])/h] + 1)*n/d]); Table[v[2, n, 6], {n, 2, 70}]

a[n_]:=n Max[Table[(Floor[(d - 1 - GCD[d, 2])/6] + 1)/d, {d, Divisors[n]}]]; Table[a[n], {n, 2, 100}] (* Vincenzo Librandi, Aug 19 2017 *)

CROSSREFS

Cf. A289435, A289436, A289437, A289438, A289439, A289440, A289441.

Sequence in context: A058071 A174961 A104889 * A117910 A275435 A029267

Adjacent sequences:  A290976 A290977 A290978 * A290980 A290981 A290982

KEYWORD

nonn

AUTHOR

Robert Price, Aug 16 2017

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 19 14:45 EDT 2019. Contains 323395 sequences. (Running on oeis4.)