A231245 Number of nX7 0..3 arrays x(i,j) with each element horizontally, 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

0, 2258, 162766, 15270416, 1450042214, 138246711032, 13176773912306, 1256579264497704, 119835433235557440, 11428554679771925538, 1089931792916983396432, 103946081601529344813032

Offset

1,2

Comments

Column 7 of A231246

Links

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

Example

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

Crossrefs

Sequence in context: A035873 A257825 A251678 * A046168 A251509 A263972

Adjacent sequences: A231242 A231243 A231244 * A231246 A231247 A231248

Keyword

nonn

Author

R. H. Hardin, Nov 06 2013

Status

approved