A262915 Number of (n+1)X(6+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, 43, 261, 2953, 121507, 1550557, 33948145, 1361585275, 42115306149, 1516528236361, 61572663026659, 2451674386383133, 100125715548126961

Offset

1,2

Comments

Column 6 of A262917.

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Cf. A262917.

Sequence in context: A259421 A202008 A258214 * A262330 A142632 A231226

Adjacent sequences: A262912 A262913 A262914 * A262916 A262917 A262918

Keyword

nonn

Author

R. H. Hardin, Oct 04 2015

Status

approved