A229456 Number of defective 3-colorings of an n X 5 0..2 array connected horizontally and vertically with exactly one mistake and colors introduced in row-major 0..2 order.

16, 324, 4962, 68790, 903332, 11451686, 141595454, 1718447506, 20556781248, 243096369158, 2847922372290, 33104931317106, 382296017735388, 4389980739706374, 50166156571004678, 570836263990509842

Offset

1,1

Comments

Column 5 of A229460.

Links

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

Formula

Empirical: a(n) = 32*a(n-1) -386*a(n-2) +2264*a(n-3) -7265*a(n-4) +13512*a(n-5) -14960*a(n-6) +9872*a(n-7) -3776*a(n-8) +768*a(n-9) -64*a(n-10).

Example

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

Crossrefs

Cf. A229460.

Sequence in context: A274893 A275135 A276297 * A246876 A176128 A223394

Adjacent sequences: A229453 A229454 A229455 * A229457 A229458 A229459

Keyword

nonn

Author

R. H. Hardin, Sep 24 2013

Status

approved