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Search: id:A059525
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A059525 Number of n X n checkerboards in which the set of red squares is edge connected. +0
1
0, 1, 13, 218, 11506, 2301877, 1732082741, 4872949974666 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Cf. A059020, A059021.

Sequence in context: A132542 A069989 A096141 this_sequence A086147 A015253 A051621

Adjacent sequences: A059522 A059523 A059524 this_sequence A059526 A059527 A059528

KEYWORD

nonn

AUTHOR

David Radcliffe (radcl008(AT)umn.edu), Jan 21 2001

EXTENSIONS

One more term from John W. Layman (layman(AT)vt.edu), Jan 25 2001

More terms from Ron Hardin (rhh(AT)cadence.com), Feb 28 2002

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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