A231079 Number of n X 6 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 and at least one element with value (x(i,j)-1) mod 4, and upper left element zero.

0, 1840, 38000, 18937480, 1782634608, 417868659864, 61990953794520, 11645089669025104, 1940181166627241952, 343673876486436908888, 59011109416261093990112, 10294673560727171622076712

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Column 6 of A231080.

Sequence in context: A159202 A238294 A274683 * A257319 A287172 A243482

Adjacent sequences: A231076 A231077 A231078 * A231080 A231081 A231082

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved