A350198 a(n) is the smallest positive integer which can be represented as the sum of distinct nonzero heptagonal numbers in exactly n ways, or 0 if no such integer exists.

1, 81, 189, 270, 343, 342, 456, 538, 557, 531, 651, 636, 676, 658, 723, 804, 784, 777, 770, 825, 844, 865, 890, 975, 960, 941, 966, 983, 959, 1030, 1040, 1012, 1080, 1053, 1039, 1119, 1046, 1078, 1079, 1064, 1072, 1173, 1071, 1180, 1152, 1193, 1194, 1226, 1220, 1247

Offset: 1

Author

Ilya Gutkovskiy, Dec 19 2021

Keywords

• nonn

Links

• Eric Weisstein's World of Mathematics, Heptagonal Number

Crossrefs

Cf. A000566, A097563, A274046, A279280, A350196, A350197, A350199.