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

Author

R. H. Hardin, Jan 19 2016

Keywords

• nonn

Comments

Column 7 of A267667.

Examples

			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
		

Links

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

Crossrefs

Cf. A267667.