A326508 Number of (binary) max-heaps on n elements from the set {0,1} containing exactly seven 0's.

1, 1, 2, 5, 10, 18, 32, 54, 94, 140, 222, 329, 532, 708, 1060, 1432, 2175, 2691, 3878, 4905, 7110, 8398, 11740, 14150, 19788, 22622, 30826, 35845, 48712, 54376, 72472, 82016, 108845, 119317, 155962, 172861, 224834, 243018, 312232, 340486, 435210, 465184

Offset

7,3

Links

Alois P. Heinz, Table of n, a(n) for n = 7..10000

Eric Weisstein's World of Mathematics, Heap

Wikipedia, Binary heap

Index entries for linear recurrences with constant coefficients, signature (1, 2, -2, 3, -3, -8, 8, -1, 1, 10, -10, -5, 5, 0, 0, 5, -5, -10, 10, 1, -1, 8, -8, -3, 3, -2, 2, 1, -1).

Crossrefs

Column k=7 of A309049.

Sequence in context: A185721 A304796 A103577 * A079006 A001936 A246712

Adjacent sequences: A326505 A326506 A326507 * A326509 A326510 A326511

Keyword

nonn,easy

Author

Alois P. Heinz, Jul 09 2019

Status

approved