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A201538
Number of nX7 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor
1
18, 899, 72811, 9526987, 1408677515, 208164634003, 28456420346436, 3505159734744220, 387870239576486118, 38812326822498760643, 3543738686502556683539, 297838575975499416278867
OFFSET
1,1
COMMENTS
Column 7 of A201539
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..0..0....0..0..0..0..1..1..1....0..0..1..1..1..2..2
..0..1..1..1..1..1..2....0..0..0..1..1..2..2....1..1..2..2..2..1..2
..1..1..1..2..2..2..2....2..2..2..0..0..1..1....2..2..0..0..0..1..2
CROSSREFS
Sequence in context: A049655 A145615 A215194 * A214160 A242446 A160013
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 02 2011
STATUS
approved