A229471 Number of defective 4-colorings of an n X n 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.

0, 6, 420, 36116, 5068384, 1317269920, 670127758336, 686446917153024, 1439114626511742976, 6238265946576239106048

Offset

1,2

Comments

Diagonal of A229479.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A229479.

Sequence in context: A159015 A106206 A174773 * A258192 A273820 A162088

Adjacent sequences: A229468 A229469 A229470 * A229472 A229473 A229474

Keyword

nonn

Author

R. H. Hardin, Sep 24 2013

Status

approved