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A267666
Number of nX7 0..1 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.
1
15, 450, 13500, 188301, 2369260, 25652956, 264709135, 2629810220, 25695609592, 248940754959, 2403684195338, 23214264266490, 224513724291545, 2177014307614418, 21166636724769010, 206403484324982865
OFFSET
1,1
COMMENTS
Column 7 of A267667.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..0..1..0..1....0..0..1..0..1..1..0....0..1..0..1..0..0..1
..0..0..1..1..0..0..1....0..1..1..0..0..1..1....0..1..0..1..1..0..0
..0..1..1..0..1..0..1....0..1..1..0..0..1..1....1..0..1..0..1..1..0
..1..0..0..1..0..1..1....1..0..1..0..1..0..0....0..1..0..1..1..0..0
CROSSREFS
Cf. A267667.
Sequence in context: A247141 A068203 A267643 * A020285 A041423 A041420
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 19 2016
STATUS
approved