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A199585 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 at least one horizontal or vertical neighbor 0
0, 0, 20, 23, 1951, 60323, 592219, 3399003, 220861580, 6086397307, 79879768821, 386032959689, 29317433209618, 852122544867919, 11206152487777257, 56509336646678083, 4391723268352660596, 130483481066218119340 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A199588

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

Some solutions for n=4

..0..0..0....0..0..1....0..0..1....0..0..0....0..1..1....0..1..1....0..0..1

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

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

..3..3..3....3..3..3....3..3..3....3..3..3....3..3..3....3..3..3....3..3..3

CROSSREFS

Sequence in context: A045563 A013339 A199360 * A093716 A117737 A062908

Adjacent sequences:  A199582 A199583 A199584 * A199586 A199587 A199588

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 08 2011

STATUS

approved

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Last modified November 29 09:18 EST 2020. Contains 338764 sequences. (Running on oeis4.)