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URL: https://oeis.org/A198603

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A198603
Number of 2nX14 0..3 arrays with values 0..3 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors.
0
122, 125168, 143724590, 173328303620, 212660032469362
OFFSET
1,1
COMMENTS
Column 7 of A198604
EXAMPLE
A solution for n=2
..0..0..1..1..2..2..3..3..1..1..1..1..1..1
..0..0..1..1..2..2..3..3..1..2..2..0..0..1
..3..3..2..2..3..3..0..0..1..2..2..0..0..1
..3..3..2..2..3..3..0..0..1..1..1..1..1..1
CROSSREFS
Sequence in context: A208397 A381165 A098129 * A237640 A258489 A015079
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 2011
STATUS
approved