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A234118
Number of (n+1)X(4+1) 0..2 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1
1
3127, 116801, 4279065, 157630963, 5807422543, 214027901025, 7888454356625, 290756314787875, 10716964158533127, 395017615132720993, 14560017639995412841, 536670372954048895219, 19781236893820566186079
OFFSET
1,1
COMMENTS
Column 4 of A234122
LINKS
FORMULA
Empirical: a(n) = 50*a(n-1) -427*a(n-2) -2748*a(n-3) +22158*a(n-4) +50476*a(n-5) -220478*a(n-6) -236864*a(n-7) +237555*a(n-8) +152850*a(n-9) -74775*a(n-10) -7956*a(n-11)
EXAMPLE
Some solutions for n=2
..1..1..1..1..0....0..0..1..1..1....1..1..0..0..0....1..2..1..2..1
..0..1..2..1..0....1..1..0..1..0....0..0..0..0..0....2..2..1..1..2
..0..1..1..1..1....0..0..1..0..1....0..0..1..0..1....1..2..1..2..1
CROSSREFS
Sequence in context: A169753 A132655 A357507 * A218160 A045172 A131276
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2013
STATUS
approved