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A233729
Number of (n+1)X(4+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal
1
2104, 21432, 233432, 2723072, 32240288, 389230764, 4696134192, 57174669348, 693181060760, 8455863542400, 102666251086924, 1252787231370072, 15219081421614496, 185695021438104644, 2256549296014445884
OFFSET
1,1
COMMENTS
Column 4 of A233733
FORMULA
Empirical recurrence of order 84 (see link above)
EXAMPLE
Some solutions for n=2
..0..1..3..1..2....2..0..2..0..2....2..0..1..2..0....2..0..3..1..3
..2..3..2..0..3....3..2..1..2..1....3..2..0..3..2....0..1..2..0..2
..0..1..0..1..2....2..0..2..0..2....1..3..1..2..0....2..0..3..2..1
CROSSREFS
Sequence in context: A332643 A015293 A159812 * A272770 A373527 A284962
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 15 2013
STATUS
approved