A273733 Number of permutations of n elements divided by the number of 5-ary heaps on n+1 elements.

1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 12, 18, 24, 30, 36, 72, 108, 144, 180, 216, 432, 648, 864, 1080, 1296, 2592, 3888, 5184, 6480, 7776, 18144, 31104, 46656, 64800, 85536, 186624, 303264, 435456, 583200, 746496, 1586304, 2519424, 3545856, 4665600, 5878656

Offset

0,7

Links

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

Wikipedia, D-ary heap

Formula

a(n) = A000142(n)/A178010(n+1).

Crossrefs

Column k=5 of A273730.

Cf. A000142, A178010.

Sequence in context: A108320 A177958 A032941 * A218345 A059460 A125141

Adjacent sequences: A273730 A273731 A273732 * A273734 A273735 A273736

Keyword

nonn

Author

Alois P. Heinz, May 28 2016

Status

approved