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A199089 Number of 4nX2 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 exactly one horizontal or vertical neighbor 1
5, 709, 127973, 26249645, 5813473253, 1354962283005, 327517079413293, 81354547180103625, 20640739602876893733, 5326171952368494472061, 1393506059395687309946181, 368808221492178082683574433 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

4n terms of column 2 of A199092

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..22

EXAMPLE

Some solutions for 12X2

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

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

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A201005 A255912 A213932 * A260481 A157281 A171269

Adjacent sequences:  A199086 A199087 A199088 * A199090 A199091 A199092

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 02 2011

STATUS

approved

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Last modified January 23 16:17 EST 2021. Contains 340385 sequences. (Running on oeis4.)