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A305781
Number of set partitions of [n] with alternating parity of elements and exactly seven blocks.
1
1, 7, 37, 169, 763, 3287, 14402, 60752, 261772, 1085823, 4614736, 18868613, 79286687, 320425251, 1333901662, 5341972670, 22066221462, 87764483463, 360206083844, 1425407602339, 5819322422329, 22944438320083, 93269292846714, 366809712490908, 1485913213777040
OFFSET
7,2
CROSSREFS
Column k=7 of A274581.
Sequence in context: A049495 A169789 A169726 * A172063 A208737 A005061
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 10 2018
STATUS
approved