login
A287586
Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than seven.
2
1, 1, 2, 5, 15, 52, 203, 877, 4140, 20269, 101873, 520839, 2690517, 13976694, 72797864, 379609217, 1981204605, 10341627330, 53967714273, 281504203138, 1467686630577, 7649011738137, 39850489168540, 207560600018243, 1080833575339527, 5627230565442222
OFFSET
0,3
LINKS
FORMULA
a(n) = A000110(n) for n <= 8.
CROSSREFS
Column k=7 of A287417.
Cf. A000110.
Sequence in context: A229224 A343668 A276724 * A287279 A287257 A287669
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 26 2017
STATUS
approved