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A290038
Number of set partitions of [n] having exactly nine blocks of size > 1.
3
34459425, 2618916300, 108030297375, 3211227869850, 77083218186975, 1588144599241200, 29158562820672285, 489227666491814250, 7636058324659014250, 112346788172994575200, 1573773827894456037850, 21155069633041246602700, 274588861338588612866050
OFFSET
18,1
LINKS
FORMULA
E.g.f.: (exp(x)-x-1)^9/9!*exp(x).
a(0) = a(1) = 0, for n>1 a(n) = 10*a(n-1) + (n-1)*A290037(n-2). - Ray Chandler, Jul 21 2017
CROSSREFS
Column k=9 of A124324.
Cf. A290037.
Sequence in context: A172687 A332388 A271769 * A289957 A263893 A250573
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Jul 18 2017
STATUS
approved