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A140337
Half the number of n X n binary matrices differing in at most two positions between adjacent rows and at most two positions between adjacent columns.
0
1, 8, 161, 3771, 65536, 968434, 13398995, 190804729, 2840301338
OFFSET
1,2
CROSSREFS
Sequence in context: A184605 A195607 A064755 * A245322 A305524 A326099
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 28 2008
STATUS
approved