A273735 Number of permutations of n elements divided by the number of 7-ary heaps on n+1 elements.

1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 16, 24, 32, 40, 48, 56, 64, 128, 192, 256, 320, 384, 448, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 65536, 98304, 131072, 163840, 196608, 229376, 262144, 524288

Offset

0,9

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Wikipedia, D-ary heap

Formula

a(n) = A000142(n)/A273694(n+1).

Crossrefs

Column k=7 of A273730.

Cf. A000142, A273694.

Sequence in context: A032887 A023790 A032943 * A257735 A269356 A269358

Adjacent sequences: A273732 A273733 A273734 * A273736 A273737 A273738

Keyword

nonn

Author

Alois P. Heinz, May 28 2016

Status

approved