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A198665 Number of nX4 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 1
2, 65, 2715, 199923, 16089057, 1382332582, 119026441960, 10314841920242, 893422225702521, 77438142132961570, 6711121950891144754, 581664320030297340439, 50412657929233287557664, 4369297837622133342788917 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A198669
LINKS
EXAMPLE
Some solutions with all values 0 to 4 for n=3
..0..1..2..2....0..0..1..1....0..0..1..1....0..0..1..1....0..1..1..2
..0..1..3..4....2..3..3..3....2..3..3..3....2..2..3..3....0..0..1..2
..3..3..3..4....2..4..4..3....2..4..4..4....4..4..1..1....3..3..4..4
CROSSREFS
Sequence in context: A002604 A294273 A199145 * A185029 A228081 A214366
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 28 2011
STATUS
approved

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Last modified May 18 21:39 EDT 2024. Contains 372666 sequences. (Running on oeis4.)