A187281 Number of (n+2)X4 0..2 arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum

859, 5385, 71745, 704041, 8256093, 90158141, 1023183069, 11390667717, 128572706665, 1443678680571, 16278197524593, 183211679594853, 2065611535683245, 23276677969280185, 262456424591728473

Offset

1,1

Comments

Column 2 of A187283

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 6X4
..0..1..0..0....0..1..1..1....0..1..0..1....0..0..0..1....0..1..0..0
..0..0..1..0....1..1..1..0....1..0..1..0....1..1..1..0....1..1..2..1
..0..0..0..1....1..1..0..2....2..0..1..0....0..0..0..1....2..0..0..0
..1..0..0..0....0..1..1..0....0..1..1..1....0..2..2..1....0..1..2..1
..0..2..0..0....2..0..1..0....2..0..1..0....1..0..0..1....1..1..2..1
..0..0..1..1....1..0..1..1....1..0..2..0....2..1..2..1....2..2..1..2

Crossrefs

Sequence in context: A345548 A345801 A183628 * A108822 A278156 A249461

Adjacent sequences: A187278 A187279 A187280 * A187282 A187283 A187284

Keyword

nonn

Author

R. H. Hardin Mar 07 2011

Status

approved