A231036 Number of nX7 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero

0, 80, 96882, 18856728, 5472540636, 1844073908022, 555813932009140, 172121737615080530, 53553780104360423648, 16590812140498319525228, 5145308089828626695232104, 1596083784558005651501379272

Offset

1,2

Comments

Column 7 of A231037

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Sequence in context: A159408 A159391 A323448 * A051184 A159444 A208187

Adjacent sequences: A231033 A231034 A231035 * A231037 A231038 A231039

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved