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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. 1
2440, 23568, 216592, 2442208, 25036784, 289389648, 3057995568, 35239626640, 377551693872, 4321333099024, 46708511630640, 531289387089424, 5779703369824304, 65409280729909520, 715049970687872816 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 17 21:17 EDT 2021. Contains 348065 sequences. (Running on oeis4.)