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A206993
Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically
1
81, 6561, 80070, 2371090, 60684900, 1482397764, 37849652838, 954576893140, 24031904480250, 606711286710758, 15303296459686032, 385968153194641688, 9736392679516458222, 245594233526815556440, 6194918451958959626262
OFFSET
1,1
COMMENTS
Column 7 of A206994
LINKS
EXAMPLE
Some solutions for n=4
..0..0..1..1..1..0..0....0..1..1..1..0..1..0....1..0..1..0..1..0..0
..1..0..0..1..1..0..1....1..0..0..1..1..1..0....1..1..0..0..1..1..1
..0..0..1..0..0..1..0....0..1..0..0..1..0..1....0..1..0..1..0..1..1
..1..1..0..0..1..1..0....0..0..1..1..0..1..0....0..0..1..1..1..0..0
CROSSREFS
Sequence in context: A228974 A178513 A016948 * A223791 A206935 A206870
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved