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A202743
Number of 2Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns
1
2, 2, 6, 22, 54, 102, 214, 582, 1590, 3814, 8662, 20934, 53942, 137190, 335574, 815942, 2032694, 5139942, 12902614, 32059846, 79807158, 200325350, 504502230, 1267146054, 3176193590, 7975495910, 20082938838, 50611676614, 127466481334
OFFSET
1,1
COMMENTS
Row 2 of A202742
LINKS
EXAMPLE
Some solutions for n=5
..1..1..0..1..0....0..1..0..1..1....1..0..1..1..0....0..1..1..1..0
..0..1..0..1..1....1..1..0..0..1....1..0..0..1..1....0..1..0..1..1
CROSSREFS
Sequence in context: A225942 A004077 A271217 * A007985 A097090 A085403
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 23 2011
STATUS
approved