A204537 Number of (n+2)X6 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

1303179, 87110239, 6010070946, 175609133220, 9923132759682, 606353019953160, 23212131642621154, 1204224497859040991

Offset

1,1

Comments

Column 4 of A204538

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A053082 A053081 A053084 * A254194 A254187 A253799

Adjacent sequences: A204534 A204535 A204536 * A204538 A204539 A204540

Keyword

nonn

Author

R. H. Hardin Jan 16 2012

Status

approved