A140339 - OEIS

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A140339

Half the number of n X n binary matrices differing in at most four positions between adjacent rows and at most four positions between adjacent columns.

1, 8, 256, 32768, 13213313, 11522939359, 14149679017875

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

CROSSREFS

Sequence in context: A024290 A253165 A140338 * A103488 A341479 A041487

Adjacent sequences: A140336 A140337 A140338 * A140340 A140341 A140342

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 28 2008

STATUS

approved