A182407 Number of ways to place k non-attacking knights on an n x n cylindrical chessboard, summed over all k >= 0.

2, 9, 34, 982, 11284, 1048768, 48027971, 23807996588, 3430123782371, 8141109957322587, 4098570575535958632, 46676507893324203092812, 77374614378004006943995980, 4352639823147918661142120756677

Offset

1,1

Links

Table of n, a(n) for n=1..14.

V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p.307

Crossrefs

Cf. A141243, A182408, A172964.

Sequence in context: A151308 A215943 A140217 * A284550 A200050 A032601

Adjacent sequences: A182404 A182405 A182406 * A182408 A182409 A182410

Keyword

nonn,hard

Author

Vaclav Kotesovec, May 09 2012

Extensions

a(14) from Vaclav Kotesovec, May 17 2021

Status

approved