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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

9,2

LINKS

Table of n, a(n) for n=9..31.

Wikipedia, Partition of a set

CROSSREFS

Column k=9 of A274581.

Sequence in context: A202660 A202120 A201084 * A005060 A125346 A190666

Adjacent sequences:  A305780 A305781 A305782 * A305784 A305785 A305786

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 10 2018

STATUS

approved

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Last modified October 17 14:15 EDT 2019. Contains 328113 sequences. (Running on oeis4.)