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A236013 Number of (n+1)X(3+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock 1
1276, 3744, 13750, 34288, 110274, 313060, 1059410, 2852400, 9387554, 25937988, 86158450, 235806192, 779991734, 2143722636, 7102177066, 19487328696, 64517987030, 177151900644, 586666746358, 1610397251352, 5332485179726 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A236018

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-2) +42*a(n-4) -21*a(n-6) -207*a(n-8) for n>13

EXAMPLE

Some solutions for n=5

..1..1..2..0....1..2..1..0....1..1..0..2....1..1..0..0....1..2..0..1

..1..1..2..1....0..1..1..2....1..1..0..0....1..1..0..0....2..2..1..0

..0..0..1..2....1..1..1..2....1..2..1..1....2..2..1..1....0..1..2..2

..2..1..0..1....1..1..0..1....0..1..1..1....2..2..1..1....0..0..1..1

..1..2..1..1....2..2..1..0....0..1..1..0....1..1..0..0....2..1..1..1

..0..2..2..0....2..2..2..0....0..2..2..2....2..0..0..0....2..2..0..0

CROSSREFS

Sequence in context: A325604 A230758 A318201 * A282440 A211685 A210365

Adjacent sequences:  A236010 A236011 A236012 * A236014 A236015 A236016

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified January 20 20:50 EST 2021. Contains 340332 sequences. (Running on oeis4.)