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A199096 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 two or fewer horizontal or vertical neighbors 1
1, 15, 280, 5295, 101460, 1999365, 40210161, 820951127, 16962540224, 353916457700, 7444303111792, 157654572063308, 3358267477535756, 71896125048485001, 1545960357028561441, 33370692254737883179 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A199101

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..56

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A159239 A279976 A308835 * A060542 A095654 A279167

Adjacent sequences:  A199093 A199094 A199095 * A199097 A199098 A199099

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 02 2011

STATUS

approved

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Last modified July 4 09:29 EDT 2020. Contains 335446 sequences. (Running on oeis4.)