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.

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

R. H. Hardin, Table of n, a(n) for n = 1..86

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

Adjacent sequences: A267663 A267664 A267665 * A267667 A267668 A267669

Keyword

nonn

Author

R. H. Hardin, Jan 19 2016

Status

approved