A140308 Number of n X n binary matrices containing no more than five 1s in any 3 X 3 sub-block.

1, 2, 16, 382, 33940, 10537021, 10478502929, 36396596300106, 433087032815881242, 17394297682298725368562

Offset

0,2

Links

Table of n, a(n) for n=0..9.

Crossrefs

Cf. A139810.

Sequence in context: A227406 A068471 A325287 * A280723 A052737 A002474

Adjacent sequences: A140305 A140306 A140307 * A140309 A140310 A140311

Keyword

nonn

Author

R. H. Hardin, May 27 2008

Status

approved