A263052 Number of (n+1)X(n+1) 0..1 arrays with each row and column not divisible by 3, read as a binary number with top and left being the most significant bits.

2, 33, 1666, 498597, 439260642, 1825928130193, 26380510465997186, 1607516667474074649381, 373842629115554331580791202, 353418497958270475251697468005873

Offset

1,1

Comments

Diagonal of A263060.

Links

R. H. Hardin, Table of n, a(n) for n = 1..11

Example

Some solutions for n=3
..1..0..1..1....1..0..0..0....0..1..0..1....1..0..1..1....1..0..1..1
..0..1..0..0....0..1..1..1....0..0..1..0....0..0..0..1....0..1..0..1
..1..0..1..1....1..0..1..0....0..1..0..1....1..0..1..1....0..1..1..1
..0..0..1..0....1..0..1..1....1..1..1..0....1..1..1..0....0..1..0..0

Crossrefs

Cf. A263060.

Sequence in context: A198901 A242621 A206385 * A090335 A302452 A113105

Adjacent sequences: A263049 A263050 A263051 * A263053 A263054 A263055

Keyword

nonn

Author

R. H. Hardin, Oct 08 2015

Status

approved