A227593 Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having nonzero determinant

32, 1024, 29676, 841984, 23778768, 668273468, 18728235880, 524299291340, 14670617834075, 410396335902204, 11478961067863911, 321051939518611230, 8979149902377382421, 251124376329059027344, 7023271647698870318046

Offset

1,1

Comments

Column 5 of A227594

Links

R. H. Hardin, Table of n, a(n) for n = 1..58

Example

Some solutions for n=4
..0..0..0..0..1....0..0..0..0..1....0..0..0..0..1....0..0..0..1..0
..1..0..1..1..1....1..0..0..0..1....0..1..1..1..0....1..0..0..0..1
..1..0..1..1..1....1..0..0..1..1....0..1..1..1..1....0..0..1..1..0
..0..1..1..0..1....0..0..1..1..1....1..1..0..1..0....1..1..1..0..1

Crossrefs

Sequence in context: A297378 A283861 A223566 * A171306 A009976 A144319

Adjacent sequences: A227590 A227591 A227592 * A227594 A227595 A227596

Keyword

nonn

Author

R. H. Hardin Jul 17 2013

Status

approved