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A199225 Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors 1
1, 15, 110, 1114, 10790, 108608, 1114424, 11614563, 122555420, 1306096140, 14036296174, 151900593514, 1653715009450, 18096656251093, 198923288701426, 2195264844234822, 24311220765553010, 270073032889614065 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A199230

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..58

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A107585 A205347 A054367 * A290752 A290753 A290361

Adjacent sequences:  A199222 A199223 A199224 * A199226 A199227 A199228

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 04 2011

STATUS

approved

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Last modified May 19 16:51 EDT 2019. Contains 323395 sequences. (Running on oeis4.)