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A199586 Number of nX4 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, 5, 23, 2943, 69023, 4748991, 207722398, 12106398432, 637249804809, 36336881030430 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A199588

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A002811 A177134 A199361 * A120488 A174106 A120660

Adjacent sequences:  A199583 A199584 A199585 * A199587 A199588 A199589

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 08 2011

STATUS

approved

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Last modified December 14 09:41 EST 2019. Contains 329979 sequences. (Running on oeis4.)