A241365 - OEIS

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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

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

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

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

CROSSREFS

Sequence in context: A230130 A011944 A271565 * A240771 A012745 A143585

Adjacent sequences: A241362 A241363 A241364 * A241366 A241367 A241368

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 20 2014

STATUS

approved