A322652 Numbers that are sums of consecutive heptagonal pyramidal numbers (A002413).

0, 1, 8, 9, 26, 34, 35, 60, 86, 94, 95, 115, 175, 196, 201, 209, 210, 308, 311, 371, 397, 405, 406, 456, 504, 619, 645, 679, 705, 713, 714, 764, 880, 960, 1075, 1101, 1135, 1161, 1166, 1169, 1170, 1409, 1508, 1525, 1605, 1720, 1780, 1806, 1814, 1815, 1911, 1981, 2046, 2289, 2380

Offset: 1

Author

Ilya Gutkovskiy, Dec 21 2018

Keywords

• nonn

Links

• Eric Weisstein's World of Mathematics, Heptagonal Pyramidal Number

Crossrefs

Cf. A002413, A002418, A321450, A322468, A322479, A322636, A322640, A322651, A322653.

Programs

Mathematica

imax = 55;
A002413 = LinearRecurrence[{4, -6, 4, -1}, {1, 8, 26, 60}, imax];
Join[{0}, Table[A002413[[i ;; j]] // Total, {i, 1, imax}, {j, i, imax}] // Flatten // Union][[;; imax]] (* Jean-François Alcover, Nov 11 2024 *)