A205260 Number of (n+2)X6 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..1 introduced in row major order

103876, 5487807, 291785631, 15472955417, 820342090696, 43501020707845, 2306771728514169, 122321759466209533, 6486393245936890354, 343956270010397913842, 18239088048925327307336, 967170376334720158996481

Offset

1,1

Comments

Column 4 of A205264

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A235721 A210180 A136312 * A076761 A236007 A129241

Adjacent sequences: A205257 A205258 A205259 * A205261 A205262 A205263

Keyword

nonn

Author

R. H. Hardin Jan 24 2012

Status

approved