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 A322652 #10 Feb 16 2025 08:33:57
%S A322652 0,1,8,9,26,34,35,60,86,94,95,115,175,196,201,209,210,308,311,371,397,
%T A322652 405,406,456,504,619,645,679,705,713,714,764,880,960,1075,1101,1135,
%U A322652 1161,1166,1169,1170,1409,1508,1525,1605,1720,1780,1806,1814,1815,1911,1981,2046,2289,2380
%N A322652 Numbers that are sums of consecutive heptagonal pyramidal numbers (A002413).
%H A322652 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HeptagonalPyramidalNumber.html">Heptagonal Pyramidal Number</a>
%t A322652 imax = 55;
%t A322652 A002413 = LinearRecurrence[{4, -6, 4, -1}, {1, 8, 26, 60}, imax];
%t A322652 Join[{0}, Table[A002413[[i ;; j]] // Total, {i, 1, imax}, {j, i, imax}] // Flatten // Union][[;; imax]] (* _Jean-François Alcover_, Nov 11 2024 *)
%Y A322652 Cf. A002413, A002418, A321450, A322468, A322479, A322636, A322640, A322651, A322653.
%K A322652 nonn
%O A322652 1,3
%A A322652 _Ilya Gutkovskiy_, Dec 21 2018