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

184, 928, 4448, 23568, 117744, 621904, 3145968, 16510480, 84078896, 439062352, 2245617264, 11685468816, 59942627248, 311163102672, 1599399124208, 8288575974672, 42663225570864, 220838397708368, 1137797259858800

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