A262853 Number of (4+2)X(n+2) 0..1 arrays with each row divisible by 7 and column not divisible by 7, read as a binary number with top and left being the most significant bits.

54, 396, 5184, 420654, 14762016, 661066920, 35819485902, 1848763876932, 97674093333720, 5273363053187598, 283250082728896200, 15255186777350855280, 823762481842229569614, 44454274055540034471036, 2399751878355335217728304

Offset: 1

Author

R. H. Hardin, Oct 03 2015

Keywords

• nonn

Comments

Row 4 of A262849.

Examples

			Some solutions for n=3
..1..1..1..0..0....0..0..1..1..1....0..1..1..1..0....0..0..1..1..1
..0..0..1..1..1....0..0..0..0..0....1..1..1..0..0....1..0..1..0..1
..0..0..1..1..1....0..0..1..1..1....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..1..1..1..0....0..0..1..1..1
..0..1..1..1..0....1..1..1..0..0....0..0..1..1..1....0..1..1..1..0
..0..0..1..1..1....1..1..1..0..0....1..0..1..0..1....0..1..1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Crossrefs

Cf. A262849.