A262916 Number of (n+1)X(7+1) 0..1 arrays with each row divisible by 3 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

1, 86, 783, 17333, 1444558, 30497815, 1282949605, 102437680622

Offset

1,2

Comments

Column 7 of A262917.

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A262917.

Sequence in context: A232680 A232678 A272379 * A262331 A128957 A258584

Adjacent sequences: A262913 A262914 A262915 * A262917 A262918 A262919

Keyword

nonn

Author

R. H. Hardin, Oct 04 2015

Status

approved