A230525 Number of nX7 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero

0, 246726, 279167078, 415065958262, 634283945584134, 959021374133908722, 1451215874840625764698, 2196329862973840181547028, 3323882830971748223236810484, 5030309718995416794788281780166

Offset

1,2

Comments

Column 7 of A230526

Links

R. H. Hardin, Table of n, a(n) for n = 1..47

Example

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

Crossrefs

Sequence in context: A146544 A237313 A321039 * A052198 A053077 A229872

Adjacent sequences: A230522 A230523 A230524 * A230526 A230527 A230528

Keyword

nonn

Author

R. H. Hardin, Oct 22 2013

Status

approved