A322637 Numbers that are sums of consecutive octagonal numbers (A000567).

0, 1, 8, 9, 21, 29, 30, 40, 61, 65, 69, 70, 96, 105, 126, 133, 134, 135, 161, 176, 201, 222, 225, 229, 230, 231, 280, 294, 309, 334, 341, 355, 363, 364, 401, 405, 408, 470, 481, 505, 510, 531, 534, 539, 540, 560, 621, 630, 645, 681, 695, 735, 736, 749, 756, 764, 765, 814, 833, 846

Offset

1,3

Links

Table of n, a(n) for n=1..60.

Eric Weisstein's World of Mathematics, Octagonal Number

Mathematica

terms = 60;
nmax = 17; kmax = 9; (* empirical *)
T = Table[n(3n-2), {n, 0, nmax}];
Union[T, Table[k MovingAverage[T, k], {k, 2, kmax}]//Flatten][[1 ;; terms]] (* Jean-François Alcover, Dec 26 2018 *)

Crossrefs

Cf. A000567, A002414, A034705, A034706, A319184, A319185, A322636.

Sequence in context: A309484 A308989 A048124 * A322640 A303957 A046258

Adjacent sequences: A322634 A322635 A322636 * A322638 A322639 A322640

Keyword

nonn

Author

Ilya Gutkovskiy, Dec 21 2018

Status

approved