A140336 - OEIS

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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

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

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

CROSSREFS

Sequence in context: A194541 A094586 A353133 * A197201 A166868 A055144

Adjacent sequences: A140333 A140334 A140335 * A140337 A140338 A140339

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 28 2008

STATUS

approved