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A140310 Number of n X n binary matrices containing no more than seven 1s in any 3 X 3 sub-block. 0
1, 2, 16, 502, 61788, 29829353, 56365481377, 417452923577327, 12115365147171963168, 1377708150938828616858899, 613888995116283293759860580312, 1071847970096627711898648239726154442 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..11.

CROSSREFS

Cf. A139810.

Sequence in context: A068472 A168402 A168406 * A168403 A140311 A012389

Adjacent sequences:  A140307 A140308 A140309 * A140311 A140312 A140313

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 27 2008

STATUS

approved

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Last modified January 18 09:26 EST 2022. Contains 350454 sequences. (Running on oeis4.)