A204535 Number of (n+2)X4 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..3 introduced in row major order

9043, 212290, 5430396, 87110239, 1851793487, 42694542185, 825548834273, 17195503706340, 371722319290833, 7585311372018021, 157816886614165794, 3332535960609074800, 69088335337556239245, 1439162071333884941158

Offset

1,1

Comments

Column 2 of A204538

Links

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

Example

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

Crossrefs

Sequence in context: A128374 A210179 A161610 * A345389 A202914 A252443

Adjacent sequences: A204532 A204533 A204534 * A204536 A204537 A204538

Keyword

nonn

Author

R. H. Hardin Jan 16 2012

Status

approved