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A265454
Number of nX4 0..n+4-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.
1
66, 3358, 216466, 13943772, 871209026, 52509347006, 3073046007824, 175659478218938, 9853875472731614, 544420779803461484, 29705625866016751450, 1604088383366277766514, 85864081342833064010380
OFFSET
1,1
COMMENTS
Column 4 of A265458.
LINKS
EXAMPLE
Some solutions for n=2
..1..3..2..4....2..0..1..3....4..2..1..2....3..1..2..1....2..3..2..4
..2..1..0..2....0..2..3..1....3..4..3..4....4..3..1..3....0..2..4..3
CROSSREFS
Cf. A265458.
Sequence in context: A062152 A138875 A138877 * A004998 A239409 A295592
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 09 2015
STATUS
approved