A230975 Number of (n+2)X(6+2) 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, no adjacent elements equal, and upper left element zero.

7056, 767376, 56791296, 5771137024, 630277210000, 66985909298064, 7053147648320400, 744552485586204304, 78687903371332695696, 8314048899342206023936, 878337906131970760399504

Offset

1,1

Comments

Column 6 of A230977

Links

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

Example

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

Crossrefs

Sequence in context: A250850 A071131 A238520 * A031582 A063057 A235194

Adjacent sequences: A230972 A230973 A230974 * A230976 A230977 A230978

Keyword

nonn

Author

R. H. Hardin, Nov 02 2013

Status

approved