This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A322610 #15 Feb 16 2025 08:33:57 %S A322610 1,4,5,10,14,15,19,29,31,33,34,46,50,60,64,65,77,85,96,106,109,110, %T A322610 111,136,141,149,160,166,170,174,175,194,195,199,226,235,245,255,258, %U A322610 259,260,274,302,304,316,330,335,354,361,364,365,368,369,394,409,411,434,440,460,471,490,496,500 %N A322610 Numbers that are sums (of a nonempty sequence) of consecutive centered triangular numbers. %H A322610 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CenteredTriangularNumber.html">Centered Triangular Number</a> %t A322610 anmax = 1000; nmax = Floor[Sqrt[2*anmax/3]] + 1; Select[Union[Flatten[Table[Sum[(3*k^2 + 3*k + 2)/2, {k, i, j}], {i, 0, nmax}, {j, i, nmax}]]], # <= anmax &] (* _Vaclav Kotesovec_, Dec 21 2018 *) %Y A322610 Cf. A005448, A005918 (2 consec), A006003, A034706, A320728, A322468, A322611, A322638, A322640. %K A322610 nonn %O A322610 1,2 %A A322610 _Ilya Gutkovskiy_, Dec 20 2018