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 A319185 Numbers that are sums of consecutive hexagonal numbers (A000384). 5
 0, 1, 6, 7, 15, 21, 22, 28, 43, 45, 49, 50, 66, 73, 88, 91, 94, 95, 111, 120, 139, 153, 154, 157, 160, 161, 190, 202, 211, 230, 231, 245, 251, 252, 273, 276, 277, 322, 325, 343, 350, 364, 365, 371, 372, 378, 421, 430, 435, 463, 475, 496, 503, 507, 518, 524, 525, 554, 561 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Table of n, a(n) for n=1..59. Eric Weisstein's World of Mathematics, Hexagonal Number MATHEMATICA anmax = 1000; nmax = Floor[Sqrt[anmax/2]] + 1; Select[Union[Flatten[Table[Sum[k*(2*k-1), {k, i, j}], {i, 0, nmax}, {j, i, nmax}]]], # <= anmax &] (* Vaclav Kotesovec, Dec 21 2018 *) CROSSREFS Cf. A000384, A002412, A034705, A034706, A319184, A322636, A322637. Sequence in context: A085512 A165767 A292348 * A196223 A106680 A214325 Adjacent sequences: A319182 A319183 A319184 * A319186 A319187 A319188 KEYWORD nonn AUTHOR Ilya Gutkovskiy, Dec 21 2018 STATUS approved

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Last modified June 4 03:55 EDT 2023. Contains 363118 sequences. (Running on oeis4.)