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A182408
Number of ways to place k non-attacking knights on an n x n toroidal chessboard, summed over all k >= 0.
2
2, 7, 34, 743, 1546, 598078, 6027057, 10163241031, 242407820869
OFFSET
1,1
LINKS
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Vaclav Kotesovec, May 09 2012
STATUS
approved