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A287257
Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= seven.
4
1, 1, 2, 5, 15, 52, 203, 877, 4140, 21146, 115843, 675473, 4168497, 27104931, 185021744, 1321754226, 9855001715, 76507188271, 617104691644, 5161680552010, 44693782407111, 399989835781046, 3694733749868820, 35179653387299934, 344876641013083336
OFFSET
0,3
LINKS
FORMULA
a(n) = A287216(n,7).
a(n) = A000110(n) for n <= 8.
CROSSREFS
Column k=7 of A287216.
Cf. A000110.
Sequence in context: A276724 A287586 A287279 * A287669 A099263 A366775
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 22 2017
STATUS
approved