A230795 Number of (n+3)X(7+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

1326125056, 5240912804416, 33574153453830144, 154252140168129506064, 710017201978342133301504, 3461877651419949227125424704, 16690132808830965644625582032400, 79884851260315122390231590624208400

Offset

1,1

Comments

Column 7 of A230796

Links

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

Example

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

Crossrefs

Sequence in context: A257901 A338455 A202723 * A172654 A172696 A172787

Adjacent sequences: A230792 A230793 A230794 * A230796 A230797 A230798

Keyword

nonn

Author

R. H. Hardin, Oct 30 2013

Status

approved