login
A287585
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 six.
2
1, 1, 2, 5, 15, 52, 203, 877, 3936, 18095, 84280, 394852, 1852811, 8691683, 40761476, 190968022, 893534860, 4175717815, 19494813589, 90945241124, 424026717957, 1976119285318, 9206350189686, 42880144574315, 199687348862859, 929807546551337, 4329119748507622
OFFSET
0,3
LINKS
FORMULA
a(n) = A000110(n) for n <= 7.
CROSSREFS
Column k=6 of A287417.
Cf. A000110.
Sequence in context: A148092 A343667 A276723 * A287278 A287256 A287668
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 26 2017
STATUS
approved