A253617 Number of (2+2)X(n+2) 0..2 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order

8664, 131378, 1955619, 29206325, 438592379, 6586610559, 98874441146, 1484785130392, 22297719051563, 334849977802421, 5028613048594528, 75517616024925219, 1134092007833070215, 17031337435362085847

Offset

1,1

Comments

Row 2 of A253615

Links

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

Example

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

Crossrefs

Sequence in context: A205913 A205905 A205763 * A203737 A214487 A254697

Adjacent sequences: A253614 A253615 A253616 * A253618 A253619 A253620

Keyword

nonn

Author

R. H. Hardin, Jan 05 2015

Status

approved