A140306 Number of n X n binary matrices containing at most three 1's in any 3 X 3 sub-block.

1, 2, 15, 130, 4852, 456904, 73948482, 35616138799, 43142990277818, 115017363443317954, 771239506285440035857

Offset

0,2

Links

Table of n, a(n) for n=0..10.

Crossrefs

Cf. A139810.

Sequence in context: A132182 A365151 A371585 * A374975 A143924 A217483

Adjacent sequences: A140303 A140304 A140305 * A140307 A140308 A140309

Keyword

nonn

Author

R. H. Hardin, May 27 2008

Status

approved