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A199352 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 one horizontal or vertical neighbors 1
1, 45, 930, 7945, 808721, 36379420, 821116806, 7583425311, 911983726469, 45130187288722, 1066404844359923, 10007712190029813, 1299200253416601860, 67226145153865158217, 1626281528857502520213, 15397791355704316162481 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A199356

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A341573 A078761 A034967 * A195466 A010961 A271795

Adjacent sequences:  A199349 A199350 A199351 * A199353 A199354 A199355

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 05 2011

STATUS

approved

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Last modified October 21 11:51 EDT 2021. Contains 348150 sequences. (Running on oeis4.)