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A222505
Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order
1
3, 3, 15, 84, 497, 2862, 15420, 86570, 484976, 2751326, 15597305, 89022483, 508390703, 2915183250, 16739260404, 96360825455, 555513635334, 3208071753051, 18550893260858, 107413402302763, 622649366897782, 3613180083184007
OFFSET
1,1
COMMENTS
Column 4 of A222509
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1..1....0..0..1..1....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..1....0..0..0..0....1..1..0..0....0..1..0..1....0..0..1..1
CROSSREFS
Sequence in context: A089403 A239600 A111674 * A292356 A370869 A209020
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2013
STATUS
approved