A229453 Number of defective 3-colorings of an n X n 0..2 array connected horizontally and vertically with exactly one mistake and colors introduced in row-major 0..2 order

0, 4, 140, 7940, 903332, 221410052, 120864516084, 149656305350148, 425051698921207676, 2789532529161418879776, 42518582519087835706922360, 1510724712014268724836823960708, 125472358126936901810932026644960976

Offset

1,2

Comments

Diagonal of A229460

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Sequence in context: A270065 A002917 A235536 * A215606 A119038 A048432

Adjacent sequences: A229450 A229451 A229452 * A229454 A229455 A229456

Keyword

nonn

Author

R. H. Hardin Sep 24 2013

Status

approved