A233678 Number of (n+1) X (4+1) 0..3 arrays with every 2 X 2 subblock having the sum of the squares of the edge differences equal to 6.

2440, 23568, 216592, 2442208, 25036784, 289389648, 3057995568, 35239626640, 377551693872, 4321333099024, 46708511630640, 531289387089424, 5779703369824304, 65409280729909520, 715049970687872816

Offset

1,1

Comments

Column 4 of A233682.

Links

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

R. H. Hardin, Empirical recurrence of order 45

Formula

Empirical recurrence of order 45 (see link above).

Example

Some solutions for n=2:
..3..2..3..2..1....3..1..1..2..1....1..2..1..2..1....2..3..2..3..3
..1..2..1..2..3....3..2..0..0..1....3..2..0..0..1....2..1..2..1..2
..3..2..3..2..1....1..2..1..2..2....1..1..1..2..1....3..1..3..3..3

Crossrefs

Sequence in context: A253835 A253929 A233912 * A252554 A259007 A259000

Adjacent sequences: A233675 A233676 A233677 * A233679 A233680 A233681

Keyword

nonn

Author

R. H. Hardin, Dec 14 2013

Status

approved