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A274861 Number of set partitions of [n] such that the difference between each element and its index (in the partition) is a multiple of four. 1
1, 1, 2, 4, 8, 16, 32, 64, 128, 264, 544, 1120, 2304, 4940, 10632, 22908, 49324, 112352, 258184, 596430, 1379150, 3431265, 8639020, 21965049, 56062850, 155582125, 436328469, 1238168841, 3534962983, 10951026755, 34135076965, 107562008116, 341226376721 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..32.

CROSSREFS

Column k=4 of A274859.

Sequence in context: A023423 A210544 A180210 * A290666 A290547 A290833

Adjacent sequences:  A274858 A274859 A274860 * A274862 A274863 A274864

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jul 09 2016

STATUS

approved

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Last modified October 21 10:33 EDT 2018. Contains 316414 sequences. (Running on oeis4.)