|
| |
|
|
A092859
|
|
"Difference" of the sequences of triangular numbers (A000217) and the primes (cf. A092858).
|
|
6
|
|
|
|
3, 4, 5, 7, 12, 13, 16, 18, 19, 22, 23, 30, 31, 38, 39, 40, 42, 43, 46, 48, 49, 50, 51, 52, 53, 56, 57, 58, 60, 61, 68, 69, 70, 72, 73, 80, 81, 82, 84, 85, 86, 87, 88, 89, 92, 93, 94, 95, 96, 98, 99, 100, 102, 103, 106, 108, 110, 111, 112, 113, 121, 122, 123, 124, 125, 126
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Here the complement of the sequence of primes (1 and the composites) is "added" to the sequence of triangulars, according to the definition outlined in A092858.
|
|
|
LINKS
|
Table of n, a(n) for n=1..66.
Ferenc Adorjan, Binary mapping of monotonic sequences and the Aronson function
|
|
|
PROG
|
(PARI) {sdif(a, b)= /*Returns the "difference" of monotonic sequences a and b */ return(mtinv(mt(a)+mt(compl(b)))) /* the functions mt(a) and mtinv(r) are defined in A051006 and A092855, respectively */ } {compl(v)=/* Returns the complement of v monotonic positive sequence */ local(n, p=0, vv=[]); n=matsize(v)[2]; for(i=1, n, for(j=p+1, v[i]-1, vv=concat (vv, j)); p=v[i]); return(vv)}
|
|
|
CROSSREFS
|
Cf. A092855, A051006, A092857, A092858, A092860, A092861, A092862, A092863, A092874.
Sequence in context: A300841 A023713 A032890 * A173444 A120424 A139440
Adjacent sequences: A092856 A092857 A092858 * A092860 A092861 A092862
|
|
|
KEYWORD
|
easy,nonn
|
|
|
AUTHOR
|
Ferenc Adorjan (fadorjan(AT)freemail.hu)
|
|
|
STATUS
|
approved
|
| |
|
|
