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A243281 Number of inequivalent (mod D_8) ways to place n nonattacking knights on an n X n board. 1
1, 2, 9, 66, 1244, 32524, 1114549, 47513547, 2401002993, 140026612346 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Cf. A201540, A243716.

Sequence in context: A196193 A118804 A020555 * A091795 A319286 A158952

Adjacent sequences:  A243278 A243279 A243280 * A243282 A243283 A243284

KEYWORD

nonn,hard

AUTHOR

Heinrich Ludwig, Jun 19 2014

STATUS

approved

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Last modified May 24 10:48 EDT 2019. Contains 323529 sequences. (Running on oeis4.)