A231061 Number of nX6 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero

0, 230, 7818, 313944, 12582344, 505135612, 20286249268, 814871303100, 32735101347962, 1315094209121840, 52833398277964844, 2122581619644690616, 85275101975137588046, 3425950358334849580350, 137638633914499167727240

Offset

1,2

Comments

Column 6 of A231063

Links

R. H. Hardin, Table of n, a(n) for n = 1..123

Example

Some solutions for n=4
..0..1..2..0..3..2....0..1..0..3..0..1....0..1..0..3..2..1....0..1..0..2..1..0
..3..0..3..1..0..3....1..2..3..2..1..2....1..2..3..2..1..0....3..2..1..3..2..1
..0..1..0..2..3..2....0..1..0..3..2..3....0..1..0..1..0..3....2..1..3..0..1..0
..3..2..1..0..2..1....1..2..3..0..1..0....3..2..3..0..1..2....3..0..2..3..0..3

Crossrefs

Sequence in context: A194490 A232379 A333136 * A231107 A231251 A051183

Adjacent sequences: A231058 A231059 A231060 * A231062 A231063 A231064

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved