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A143870 Number of ways of placing kings with no more than 1 mutual attack on an n X n chessboard. +0
1
1, 2, 11, 91, 1462, 38483, 1755113, 140404442, 19400886875, 4764856837927 (list; graph; listen)
OFFSET

0,2

CROSSREFS

Sequence in context: A138552 A004677 A094955 this_sequence A047854 A122708 A005366

Adjacent sequences: A143867 A143868 A143869 this_sequence A143871 A143872 A143873

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Sep 04 2008

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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