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A183695
Number of (n+1)X7 0..2 arrays with every 2X2 subblock nonsingular
1
486746, 205047906, 84872526674, 35325040673626, 14676897303777902, 6101430466182955346, 2535999716660879680590, 1054127029029754862576918, 438155240020993469139854206, 182123496360117569534537367118
OFFSET
1,1
COMMENTS
Column 6 of A183698
LINKS
EXAMPLE
Some solutions for 3X7
..1..0..2..0..2..0..1....1..0..1..0..1..0..1....1..0..2..0..1..1..0
..0..2..0..1..0..1..2....0..2..0..2..0..2..0....0..1..0..1..0..1..1
..1..0..1..1..1..2..0....2..0..2..1..1..0..1....1..0..1..0..1..1..2
CROSSREFS
Sequence in context: A205036 A205284 A190387 * A216070 A163401 A022215
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 06 2011
STATUS
approved