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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
1
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 11 2013
STATUS
approved