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A203541
Number of nX7 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1
1
0, 676, 69920, 8479744, 1680210240, 257720706244, 44312000955508, 7260263864381124, 1226995111990493792, 204147560099024833600, 34127708705716358062368, 5703975087798515553780804
OFFSET
1,2
COMMENTS
Column 7 of A203542
LINKS
EXAMPLE
Some solutions for n=5
..1..0..1..2..1..0..1....0..0..2..0..1..0..0....1..1..0..0..2..1..1
..1..0..1..0..1..0..1....1..1..1..0..1..2..1....0..0..0..1..2..0..0
..0..2..2..0..2..1..2....2..0..1..0..0..2..1....1..2..2..1..2..1..0
..0..1..2..1..1..1..0....1..0..0..0..0..2..0....1..1..1..0..0..1..1
..1..1..0..0..0..1..0....1..0..2..1..1..1..0....0..0..0..1..1..0..0
CROSSREFS
Sequence in context: A348319 A059745 A028818 * A014759 A058462 A058450
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 02 2012
STATUS
approved