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A129898 Number of ways of placing non-attacking knights on an n X n chessboard symmetric under horizontal and vertical reflection. +0
1
1, 2, 2, 10, 7, 63, 38, 1252, 456, 42951, 11051, 2411116, 461788, 300699154, 38535499, 76231743090, 6586274655, 36545866507976, 2160036716063, 34857588279065543, 1397443585027894, 67527452467684091249 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A163808 A127058 A094359 this_sequence A135996 A141610 A019241

Adjacent sequences: A129895 A129896 A129897 this_sequence A129899 A129900 A129901

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Aug 25 2008

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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