A204948 Number of (n+2)X4 0..2 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..2 introduced in row major order

4041, 41353, 457852, 4566666, 48128792, 523821125, 5530809140, 58869604914, 631407564661, 6728446852074, 71782201831466, 767149995946511, 8188160552795512, 87406003728948696, 933400577286373617

Offset

1,1

Comments

Column 2 of A204954

Links

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

Example

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

Crossrefs

Sequence in context: A252686 A178274 A332458 * A237030 A252809 A202313

Adjacent sequences: A204945 A204946 A204947 * A204949 A204950 A204951

Keyword

nonn

Author

R. H. Hardin Jan 20 2012

Status

approved