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A236051 Number of (n+1)X(4+1) 0..2 arrays colored with the difference of the maximum and minimum in each 2X2 subblock 1
3760, 11656, 32608, 92392, 258432, 741592, 2124772, 6124496, 17547052, 50132124, 143260344, 410835816, 1177174628, 3373853708, 9656442520, 27660783860, 79209492352, 226961257440, 649974851544, 1862015249488, 5332321730288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A236055

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-2) +3*a(n-3) +24*a(n-4) +21*a(n-5) +28*a(n-6) -64*a(n-7) -199*a(n-8) -396*a(n-9) -578*a(n-10) -30*a(n-11) -136*a(n-12) -192*a(n-13) for n>16

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A285158 A238031 A178162 * A133967 A133969 A133970

Adjacent sequences:  A236048 A236049 A236050 * A236052 A236053 A236054

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified May 22 16:07 EDT 2022. Contains 353957 sequences. (Running on oeis4.)