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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A184605 A195607 A064755 * A245322 A305524 A326099

Adjacent sequences: A140334 A140335 A140336 * A140338 A140339 A140340

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 28 2008

STATUS

approved

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Last modified December 5 02:23 EST 2022. Contains 358572 sequences. (Running on oeis4.)