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

Author

Alois P. Heinz, Apr 29 2016

Keywords

• nonn

Links

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

Crossrefs

Column k=5 of A261959.