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A233676 Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 6 1
184, 928, 4448, 23568, 117744, 621904, 3145968, 16510480, 84078896, 439062352, 2245617264, 11685468816, 59942627248, 311163102672, 1599399124208, 8288575974672, 42663225570864, 220838397708368, 1137797259858800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233682

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 7*a(n-1) +11*a(n-2) -157*a(n-3) +202*a(n-4) +554*a(n-5) -1224*a(n-6) -112*a(n-7) +1584*a(n-8) -928*a(n-9) +64*a(n-10)

EXAMPLE

Some solutions for n=5

..0..0..2....2..1..2....2..1..2....2..1..2....2..2..0....2..2..2....1..1..2

..2..1..1....3..1..3....3..1..3....2..0..0....0..1..0....3..1..3....2..0..0

..2..0..2....3..2..3....2..2..3....2..1..2....0..2..0....3..2..2....2..1..2

..2..1..2....3..1..3....0..1..3....2..3..2....0..1..0....3..1..0....0..1..3

..2..3..2....3..2..2....2..1..2....2..1..2....2..1..2....2..2..0....2..2..2

..2..1..1....3..1..3....2..3..2....3..3..3....2..0..0....0..1..0....3..1..3

CROSSREFS

Sequence in context: A239457 A235258 A235251 * A234152 A234146 A164997

Adjacent sequences:  A233673 A233674 A233675 * A233677 A233678 A233679

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2013

STATUS

approved

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Last modified September 20 11:50 EDT 2021. Contains 347586 sequences. (Running on oeis4.)