A271326 a(n) = A269347(3n).

3, 15, 30, 51, 84, 111, 150, 195, 246, 318, 366, 435, 510, 591, 684, 771, 882, 975, 1086, 1218, 1326, 1455, 1590, 1731, 1884, 2031, 2190, 2370, 2526, 2718, 2886, 3075, 3270, 3483, 3684, 3891, 4128, 4335, 4566, 4818, 5046, 5295, 5550, 5811, 6084

Offset

1,1

Comments

This sequence represents the "peaks" of A269347(n), which occur for that sequence when n is divisible by 3.

Terms of this sequence are equal to 3n^2 + 3 with predictable frequency; see my comment on A271328.

Links

Alec Jones, Table of n, a(n) for n = 1..10001

Crossrefs

Cf. A269347, A271328

Sequence in context: A297851 A298088 A290325 * A106354 A228308 A018972

Adjacent sequences: A271323 A271324 A271325 * A271327 A271328 A271329

Keyword

nonn,easy

Author

Alec Jones, Apr 04 2016

Status

approved