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A195648 Number of ways to place 9n nonattacking kings on a 18 x 2n chessboard. 4
5120, 1501674, 144605184, 7683664202, 282359109140, 8080813574550, 193194265398240, 4035559337688370, 75925129079783308, 1314578079936797520, 21279238303065874504, 325878859655043000344, 4765036384361599508980, 67005992305769489072298, 911373843678367079288192 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Vaclav Kotesovec, Non-attacking chess pieces
Vaclav Kotesovec, Generating function
FORMULA
Recurrence order is 548.
CROSSREFS
Column k=9 of A350819.
Sequence in context: A187030 A237328 A186968 * A252919 A255779 A237206
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Sep 22 2011
STATUS
approved

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Last modified March 28 04:05 EDT 2024. Contains 371235 sequences. (Running on oeis4.)