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A272433
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Number of ordered set partitions of {1,2,...,n} such that no part has the same size as any of its five immediate predecessors.
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2
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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
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OFFSET
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0,4
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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