A182408 Number of ways to place k non-attacking knights on an n x n toroidal chessboard, summed over all k >= 0.

2, 7, 34, 743, 1546, 598078, 6027057, 10163241031, 242407820869

Offset

1,1

Links

Table of n, a(n) for n=1..9.

V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p.310

Crossrefs

Cf. A141243, A182407, A067958, A027683, A067960.

Sequence in context: A222891 A342411 A231580 * A057298 A058941 A287327

Adjacent sequences: A182405 A182406 A182407 * A182409 A182410 A182411

Keyword

nonn,hard,more

Author

Vaclav Kotesovec, May 09 2012

Status

approved