A203788 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

112, 10576, 3784288, 5426653360, 31960919852416, 783865714144759744, 80711089384087351043680

Offset

1,1

Comments

Diagonal of A203796

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A223613 A075910 A089277 * A180027 A240229 A187672

Adjacent sequences: A203785 A203786 A203787 * A203789 A203790 A203791

Keyword

nonn

Author

R. H. Hardin Jan 05 2012

Status

approved