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A287259
Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= nine.
4
1, 1, 2, 5, 15, 52, 203, 877, 4140, 21147, 115975, 678569, 4213081, 27621156, 190402182, 1375129039, 10374133545, 81541494757, 666269176903, 5648127595636, 49587725282894, 450158439775999, 4219372853286578, 40779812327165914, 405907919759151220
OFFSET
0,3
LINKS
FORMULA
a(n) = A287216(n,9).
a(n) = A000110(n) for n <= 10.
CROSSREFS
Column k=9 of A287216.
Cf. A000110.
Sequence in context: A276726 A287588 A287281 * A287671 A164864 A366776
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 22 2017
STATUS
approved