A230966 Number of nX4 0..3 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 4 and at least one element with value (x(i,j)-1) mod 4, and upper left element zero

0, 200, 8696, 741638, 66622532, 5943688666, 529115404280, 47219421549032, 4214648926735586, 376126709832217804, 33568589665774312308, 2995952244430801142068, 267383625305287192711402

Offset

1,2

Comments

Column 4 of A230968

Links

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

Example

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

Crossrefs

Sequence in context: A219414 A022152 A249238 * A221039 A221502 A232132

Adjacent sequences: A230963 A230964 A230965 * A230967 A230968 A230969

Keyword

nonn

Author

R. H. Hardin, Nov 02 2013

Status

approved