A222610 Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

1, 1, 3, 12, 40, 149, 615, 2659, 11641, 51672, 231598, 1044550, 4729221, 21473854, 97727797, 445587611, 2034814173, 9304775285, 42600153350, 195249156987, 895771869115, 4113392176083, 18904548916567, 86949854091897

Offset

1,3

Comments

Column 2 of A222616

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

All solutions for n=3
..0..0....0..1....0..0
..0..0....1..1....0..0
..0..0....1..1....0..1

Crossrefs

Sequence in context: A026071 A102839 A050182 * A162970 A126725 A053043

Adjacent sequences: A222607 A222608 A222609 * A222611 A222612 A222613

Keyword

nonn

Author

R. H. Hardin Feb 26 2013

Status

approved