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

1,1

Comments

Column 5 of A262319.

Links

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

Example

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

Crossrefs

Cf. A262319.

Sequence in context: A106087 A341081 A201812 * A214150 A262920 A183455

Adjacent sequences: A262314 A262315 A262316 * A262318 A262319 A262320

Keyword

nonn

Author

R. H. Hardin, Sep 17 2015

Status

approved