A322637 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

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