A210301 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order

0, 1091, 1575467, 11061291451, 437971830335043, 98959142504758664603, 127648944948853198818703027, 940014634185937826679488616180507

Offset

1,2

Comments

Diagonal of A210309

Links

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

Example

Some solutions for n=4
..0..0..0..0..1....0..0..0..0..1....0..1..0..0..0....0..1..0..0..0
..2..1..3..1..2....2..3..1..2..0....0..2..1..3..2....0..2..0..0..0
..1..3..2..2..0....2..0..0..1..2....1..1..3..0..3....3..2..3..1..2
..2..2..1..3..0....3..2..1..2..3....2..3..0..1..0....1..1..2..1..3
..1..3..2..2..2....1..1..3..1..2....2..1..3..3..0....0..2..0..1..2

Crossrefs

Sequence in context: A161118 A031711 A253216 * A043597 A043837 A043849

Adjacent sequences: A210298 A210299 A210300 * A210302 A210303 A210304

Keyword

nonn

Author

R. H. Hardin Mar 19 2012

Status

approved