A196813 Number of ways to place 3 nonattacking nightriders on an n X n toroidal board

0, 0, 6, 96, 600, 1392, 2156, 10624, 22410, 62400, 82280, 210336, 280540, 495488, 955950, 1332736, 1844976, 2924640, 3933456, 6319200, 7954170, 10648000, 14081980, 19826304, 25502500, 31809856, 41037354, 52338272, 63979916, 84001200, 98348740, 123033600

Offset

1,3

Comments

A nightrider is a fairy chess piece that can move (proportionate to how a knight moves) in any direction.

Links

Table of n, a(n) for n=1..32.

V. Kotesovec, Non-attacking chess pieces, 4th edition p.195

Vaclav Kotesovec, Generating function and explicit formula

Crossrefs

Cf. A173429, A196811

Sequence in context: A116256 A275086 A222971 * A179058 A303212 A226549

Adjacent sequences: A196810 A196811 A196812 * A196814 A196815 A196816

Keyword

nonn

Author

Vaclav Kotesovec, Oct 06 2011

Status

approved