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A198250 Number of 2nX10 0..4 arrays with values 0..4 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors 0
15, 6528, 4059950, 2606019472, 1683040515731, 1088857594220452, 704825868750085006 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A198253
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..0..0..0..1..1....0..0..0..0..0..0..1..1..2..2
..0..2..2..3..3..4..4..0..1..1....0..1..1..3..3..0..1..1..2..2
..0..2..2..3..3..4..4..0..3..3....0..1..1..3..3..0..3..3..0..0
..0..0..0..0..0..0..0..0..3..3....0..0..0..0..0..0..3..3..0..0
..1..1..2..2..1..1..3..3..2..2....3..3..4..4..1..1..2..2..1..1
..1..1..2..2..1..1..3..3..2..2....3..3..4..4..1..1..2..2..1..1
CROSSREFS
Sequence in context: A206360 A292972 A204677 * A066968 A113795 A205155
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 22 2011
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)