A262317 Number of (n+2)X(5+2) 0..1 arrays with each row and column divisible by 7, read as a binary number with top and left being the most significant bits.

19, 61, 361, 6043, 37873, 413893, 8003035, 103003837, 1659181705, 30797072443, 511038639601, 9076599454261, 167313442296139, 2990829944907421, 54803016760339465, 1017782964712240411, 18753725206393581553

Offset: 1

Author

R. H. Hardin, Sep 17 2015

Keywords

• nonn

Comments

Column 5 of A262319.

Examples

			Some solutions for n=4
..1..0..1..0..1..0..0....0..0..0..1..1..1..0....0..0..0..1..1..1..0
..1..1..1..0..0..0..0....0..1..1..1..1..1..1....0..1..0..0..0..1..1
..0..1..1..1..0..0..0....1..1..1..1..1..1..0....0..0..0..0..1..1..1
..0..1..0..1..0..1..0....1..1..1..0..1..1..1....0..1..1..0..0..0..1
..0..0..0..1..1..1..0....1..0..0..0..1..1..0....0..0..1..1..1..0..0
..1..0..0..0..1..1..0....0..0..0..0..1..1..1....0..1..1..1..0..0..0
		

Links

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

Crossrefs

Cf. A262319.