A204397 Number of (n+2)X9 0..1 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..1 introduced in row major order.

1276088, 47258642, 1547710600, 46611372488, 1536831498888, 49709204045442, 1597165262402016, 51721201311318450, 1671276692913450360, 53960732756570371778, 1744025607538600418280, 56353915920328789667528

Offset

1,1

Comments

Column 7 of A204398

Links

R. H. Hardin, Table of n, a(n) for n = 1..127

Example

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

Crossrefs

Sequence in context: A232203 A147670 A392077 * A058894 A328256 A118419

Adjacent sequences: A204394 A204395 A204396 * A204398 A204399 A204400

Keyword

nonn

Author

R. H. Hardin, Jan 15 2012

Status

approved