A204286 Number of (n+2)X4 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..3 introduced in row major order

9747, 190347, 4225471, 69321821, 1350148902, 27980729421, 524910976410, 10254308165044, 204323923920303, 3952888500512569, 77312665141597838, 1521497665634852978, 29682765725895741308, 580820702897175020144

Offset

1,1

Comments

Column 2 of A204289

Links

R. H. Hardin, Table of n, a(n) for n = 1..171

Example

Some solutions for n=3
..0..0..1..0....0..1..0..1....0..0..1..0....0..0..0..0....0..1..2..1
..2..1..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..2..1..1
..1..1..1..0....1..1..1..1....1..1..1..1....1..2..2..2....2..2..2..1
..1..1..2..0....1..1..0..2....0..0..1..1....1..1..1..1....1..2..3..1
..2..1..3..0....3..3..3..3....2..0..1..0....3..1..1..3....0..2..3..1

Crossrefs

Sequence in context: A206631 A031860 A023687 * A242878 A247696 A010092

Adjacent sequences: A204283 A204284 A204285 * A204287 A204288 A204289

Keyword

nonn

Author

R. H. Hardin Jan 13 2012

Status

approved