A272433 Number of ordered set partitions of {1,2,...,n} such that no part has the same size as any of its five immediate predecessors.

1, 1, 1, 7, 9, 31, 403, 757, 2873, 12607, 333051, 761377, 3699435, 16383121, 108710085, 4855474267, 13594184793, 76375572751, 388660153867, 2504206435681, 20148774553859, 1556349601444477, 10470804739432665, 113472934257201031, 1621680033815396315

Offset

0,4

Links

Alois P. Heinz, Table of n, a(n) for n = 0..60

Crossrefs

Column k=5 of A261959.

Sequence in context: A131623 A032011 A272434 * A272432 A272431 A261961

Adjacent sequences: A272430 A272431 A272432 * A272434 A272435 A272436

Keyword

nonn

Author

Alois P. Heinz, Apr 29 2016

Status

approved