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Search: id:A129894
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A129894 Number of ways of placing non-attacking knights on an n X n chessboard symmetric under horizontal reflection. +0
1
1, 2, 4, 26, 35, 821, 1462, 148176, 221880, 96574099, 126381799, 196582061878, 269726664738, 1805524692669120, 2273457768078921, 66873306557904082902, 76981272132177635155, 9380430300181898788236006 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A162126 A162118 A128774 this_sequence A028386 A155120 A144691

Adjacent sequences: A129891 A129892 A129893 this_sequence A129895 A129896 A129897

KEYWORD

nonn

AUTHOR

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

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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