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A199351 Number of nX2 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, 1, 45, 105, 4251, 9175, 447916, 958259, 50233308, 106354160, 5897448012, 12409253763, 715649665145, 1498983975673, 89063549460702, 185913744482294, 11306002322078532, 23537550026903929, 1458334886366979145 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A199356

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..40

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A331190 A332593 A144486 * A199517 A180971 A043442

Adjacent sequences:  A199348 A199349 A199350 * A199352 A199353 A199354

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 05 2011

STATUS

approved

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Last modified April 7 04:20 EDT 2020. Contains 333292 sequences. (Running on oeis4.)