A134262 Number of n X n binary matrices with every 1 adjacent to another 1 horizontally or vertically.

1, 10, 250, 22946, 8222576, 11168045764, 57451983566596, 1121231537486377866, 82999668877677132763564, 23304040481827726137141908956, 24817820869161647380317564563160782

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