Voozh

A241365

Number of nX3 0..2 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..2 introduced in row major order.

2, 28, 460, 7376, 118488, 1904096, 30598800, 491723328, 7902006144, 126985443680, 2040659387360, 32793449527584, 526991588462752, 8468768559462432, 136093331438385952, 2187023382674637856, 35145522751283965984

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 3 of A241370

LINKS

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

FORMULA

Empirical: a(n) = 15*a(n-1) +18*a(n-2) -8*a(n-3) -68*a(n-4) -164*a(n-5) -256*a(n-6) -176*a(n-7) +64*a(n-8)

EXAMPLE

Some solutions for n=4

..0..1..2....0..1..0....0..0..1....0..1..0....0..1..2....0..1..0....0..1..0