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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A233733

LINKS

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

R. H. Hardin, Empirical recurrence of order 84

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 A284962 A146895

Adjacent sequences:  A233726 A233727 A233728 * A233730 A233731 A233732

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 15 2013

STATUS

approved

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Last modified October 20 02:01 EDT 2021. Contains 348099 sequences. (Running on oeis4.)