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A272434 Number of ordered set partitions of {1,2,...,n} such that no part has the same size as any of its six immediate predecessors. 2
1, 1, 1, 7, 9, 31, 403, 757, 2873, 12607, 333051, 761377, 3699435, 16383121, 108710085, 4855474267, 13594184793, 76375572751, 388660153867, 2504206435681, 20148774553859, 1556349601444477, 5050276538344665, 33326552998257031, 186169293932977115, 1305062351972825281, 9600936552132048553, 106019265737746665727, 12708226588208611056333, 98137877588880676995127 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..50

CROSSREFS

Column k=6 of A261959.

Sequence in context: A147186 A131623 A032011 * A272433 A272432 A272431

Adjacent sequences:  A272431 A272432 A272433 * A272435 A272436 A272437

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Apr 29 2016

STATUS

approved

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Last modified April 5 20:24 EDT 2020. Contains 333260 sequences. (Running on oeis4.)