A230973 Number of (n+2) X (4+2) 0..3 arrays x(i,j) with each element 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.

256, 9216, 215296, 6170256, 190219264, 5771137024, 173342326336, 5217149355664, 157210070262336, 4736078434765584, 142657909428672400, 4297207390388366224, 129444764469058322064, 3899248609061089917504, 117456328654788972226816

Offset

1,1

Comments

Column 4 of A230977.

Links

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

Example

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

Crossrefs

Cf. A230977.

Sequence in context: A187955 A253135 A128991 * A191680 A191496 A016960

Adjacent sequences: A230970 A230971 A230972 * A230974 A230975 A230976

Keyword

nonn

Author

R. H. Hardin, Nov 02 2013

Status

approved