A234406 Number of (n+1)X(1+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 12 and no adjacent elements equal

300, 2540, 21288, 185000, 1604528, 14012832, 122325680, 1069226864, 9345048848, 81695419072, 714175865792, 6243557498768, 54582978669760, 477184127534528, 4171712443846912, 36470643136674336, 318839705961752720

Offset

1,1

Comments

Column 1 of A234412

Links

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

Formula

Empirical: a(n) = 10*a(n-1) +20*a(n-2) -301*a(n-3) -44*a(n-4) +2831*a(n-5) -301*a(n-6) -8624*a(n-7) -3046*a(n-8) +4932*a(n-9) +2352*a(n-10)

Example

Some solutions for n=4
..0..2....5..4....6..3....3..1....5..0....6..4....2..0....1..3....5..0....0..2
..3..6....6..0....2..0....0..4....6..4....1..0....6..2....4..0....6..4....3..6
..5..2....4..2....5..6....2..6....0..3....6..4....1..0....6..2....0..2....0..1
..6..0....6..0....0..1....1..0....2..6....4..0....3..6....3..5....6..3....1..6
..4..3....4..2....1..6....6..2....0..3....5..6....0..2....4..0....0..2....5..4

Crossrefs

Sequence in context: A128391 A328132 A234412 * A092715 A241943 A036517

Adjacent sequences: A234403 A234404 A234405 * A234407 A234408 A234409

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Status

approved