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A134262 Number of n X n binary matrices with every 1 adjacent to another 1 horizontally or vertically. 1
1, 10, 250, 22946, 8222576, 11168045764, 57451983566596, 1121231537486377866, 82999668877677132763564, 23304040481827726137141908956, 24817820869161647380317564563160782 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Sequence in context: A265854 A128013 A178021 * A240289 A001536 A114450

Adjacent sequences:  A134259 A134260 A134261 * A134263 A134264 A134265

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 14 2008

STATUS

approved

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Last modified December 13 17:36 EST 2018. Contains 318086 sequences. (Running on oeis4.)