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A140336
Half the number of n X n binary matrices differing in at most one position between adjacent rows and at most one position between adjacent columns.
0
1, 5, 16, 47, 138, 419, 1358, 4615, 16562, 61879, 240506, 967043, 4011246, 17127819, 75094742
OFFSET
1,2
CROSSREFS
Sequence in context: A194541 A094586 A353133 * A197201 A166868 A055144
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 28 2008
STATUS
approved