A230788 Number of (n+3)X(n+3) 0..3 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

144, 32912, 280495504, 7664693723264, 1365596520787459216, 1865179580060888014989264, 16690132808830965644625582032400

Offset

1,1

Comments

Diagonal of A230796

Links

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

Example

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

Crossrefs

Sequence in context: A231784 A203818 A299953 * A231938 A028473 A130118

Adjacent sequences: A230785 A230786 A230787 * A230789 A230790 A230791

Keyword

nonn

Author

R. H. Hardin, Oct 30 2013

Status

approved