A263872 Number of (n+1)X(7+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nondecreasing.

5, 5, 25, 41, 494, 2909, 62904, 525967, 8468941, 71260394, 850301770, 6589670154, 62160939006, 434482926964, 3416830587073, 21593530137906, 146883022822593, 846348872934578, 5108443008090443, 27076148532186899, 147708619212786406

Offset

1,1

Comments

Column 7 of A263873.

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Example

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

Crossrefs

Cf. A263873.

Sequence in context: A154630 A245520 A245130 * A237654 A038247 A263798

Adjacent sequences: A263869 A263870 A263871 * A263873 A263874 A263875

Keyword

nonn

Author

R. H. Hardin, Oct 28 2015

Status

approved