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A305783
Number of set partitions of [n] with alternating parity of elements and exactly nine blocks.
1
1, 9, 61, 359, 2071, 11521, 64536, 351890, 1937292, 10385051, 56327364, 297361209, 1592259558, 8294350334, 43929021137, 226237017737, 1187116072881, 6055309005874, 31524381075907, 159529143743414, 825010507438945, 4148043681253075, 21331478060780614
OFFSET
9,2
CROSSREFS
Column k=9 of A274581.
Sequence in context: A202660 A202120 A201084 * A005060 A125346 A190666
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 10 2018
STATUS
approved