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A199196 Number of nX3 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or two horizontal or vertical neighbors 1
1, 14, 114, 447, 17598, 342958, 3366282, 13445925, 707828355, 15468414047, 160870584083, 660014693614, 37999381354839, 871398222241220, 9306441021808721, 38698706989763825, 2328196816238106071 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A199201

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..21

EXAMPLE

Some solutions for n=4

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

..2..3..1....2..3..2....2..3..1....1..2..3....1..2..3....1..0..3....3..2..3

..1..2..3....0..1..3....3..2..0....3..0..2....3..0..1....3..2..0....2..1..0

..2..3..0....3..2..1....1..3..2....1..3..0....2..3..2....1..3..2....1..0..3

CROSSREFS

Sequence in context: A044346 A044727 A199251 * A071573 A076429 A027204

Adjacent sequences:  A199193 A199194 A199195 * A199197 A199198 A199199

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 03 2011

STATUS

approved

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Last modified October 20 07:13 EDT 2021. Contains 348099 sequences. (Running on oeis4.)