A187424 Number of (n+1)X7 0..2 arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants

76263, 2142214, 56472058, 2183222530, 72355701549

Offset

1,1

Comments

Column 6 of A187425

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 3X7
..0..0..2..1..0..0..0....0..0..2..1..0..0..2....0..0..1..1..1..0..2
..0..0..2..2..2..1..2....0..0..1..1..1..2..2....0..0..0..1..2..0..0
..0..1..2..1..0..0..0....0..2..2..0..1..2..0....0..0..1..1..1..0..2

Crossrefs

Sequence in context: A234895 A096888 A049026 * A186216 A295818 A183744

Adjacent sequences: A187421 A187422 A187423 * A187425 A187426 A187427

Keyword

nonn

Author

R. H. Hardin Mar 09 2011

Status

approved