A243281 Number of inequivalent (mod D_8) ways to place n nonattacking knights on an n X n board.

1, 2, 9, 66, 1244, 32524, 1114549, 47513547, 2401002993, 140026612346

Offset

1,2

Links

Table of n, a(n) for n = 1..10

Crossrefs

Cf. A201540, A243716.

Sequence in context: A118804 A365995 A020555 * A091795 A319286 A158952

Adjacent sequences: A243278 A243279 A243280 * A243282 A243283 A243284

Keyword

nonn,hard

Author

Heinrich Ludwig, Jun 19 2014

Status

approved