A233646 Number of (n+1)X(1+1) 0..5 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 14.

144, 772, 3984, 20936, 108864, 570208, 2971200, 15541312, 81063040, 423704496, 2211225408, 11553144144, 60311293088, 315043601664, 1644900877696, 8591310050640, 44860831279136, 234292373710800, 1223453493401024

Offset

1,1

Comments

Column 1 of A233653

Links

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

Formula

Empirical: a(n) = 2*a(n-1) +31*a(n-2) -36*a(n-3) -261*a(n-4) +206*a(n-5) +714*a(n-6) -356*a(n-7) -528*a(n-8) +256*a(n-9)

Example

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

Crossrefs

Sequence in context: A250428 A033696 A233653 * A268806 A112067 A210724

Adjacent sequences: A233643 A233644 A233645 * A233647 A233648 A233649

Keyword

nonn

Author

R. H. Hardin, Dec 14 2013

Status

approved