A186216 Number of (n+1) X 7 0..2 arrays with every 2 X 2 subblock determinant equal to some horizontal or vertical neighbor 2 X 2 subblock determinant.

76263, 20738153, 2259545215, 363322785761, 49524283508081

Offset

1,1

Comments

Column 6 of A186218.

Links

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

Example

Some solutions for 3 X 7
..0..0..0..0..1..2..2....0..0..2..2..1..2..2....0..0..0..0..2..0..2
..0..0..0..0..1..1..2....0..0..0..0..0..0..0....0..0..0..0..0..0..1
..0..0..0..0..1..0..2....0..0..0..2..2..1..2....0..0..1..1..2..0..1

Crossrefs

Cf. A186218.

Sequence in context: A096888 A049026 A187424 * A295818 A183744 A236709

Adjacent sequences: A186213 A186214 A186215 * A186217 A186218 A186219

Keyword

nonn

Author

R. H. Hardin Feb 15 2011

Status

approved