A229478 Number of defective 4-colorings of an n X 7 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.

246, 31232, 1077588, 31875248, 900320160, 24789931648, 670127758336, 17852292042240, 469937543774464, 12248485869502464, 316606271260610304, 8126559364143173120, 207342059767316802816, 5262820354775597920256

Offset

1,1

Comments

Column 7 of A229479.

Links

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

Example

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

Crossrefs

Cf. A229479.

Sequence in context: A293369 A212475 A186787 * A289334 A251516 A208188

Adjacent sequences: A229475 A229476 A229477 * A229479 A229480 A229481

Keyword

nonn

Author

R. H. Hardin, Sep 24 2013

Status

approved