A222987 Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

2, 4, 7, 25, 86, 332, 1172, 4566, 16562, 64718, 238856, 933970, 3493494, 13656426, 51627746, 201696470, 768828322, 3002421486, 11518434130, 44975259758, 173404040458, 677168068918, 2621003912178, 10238867982150, 39750857800978

Offset

1,1

Comments

Row 2 of A222986

Links

R. H. Hardin, Table of n, a(n) for n = 1..88

Example

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

Crossrefs

Sequence in context: A036440 A103001 A343798 * A222907 A179386 A343977

Adjacent sequences: A222984 A222985 A222986 * A222988 A222989 A222990

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved