A305783 Number of set partitions of [n] with alternating parity of elements and exactly nine blocks.

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

Author

Alois P. Heinz, Jun 10 2018

Keywords

• nonn

Links

• Wikipedia, Partition of a set

Crossrefs

Column k=9 of A274581.