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A236014 Number of (n+1)X(4+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock 1
4672, 12544, 34288, 95848, 267424, 771564, 2218212, 6382872, 18265360, 52177252, 149258712, 427853252, 1226410112, 3513633704, 10058786964, 28806493432, 82512239868, 236383009160, 677059152856, 1939300994548, 5554357282184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A236018

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

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

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

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

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

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

CROSSREFS

Sequence in context: A204489 A252127 A188364 * A202431 A066731 A230487

Adjacent sequences:  A236011 A236012 A236013 * A236015 A236016 A236017

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified May 24 11:23 EDT 2019. Contains 323529 sequences. (Running on oeis4.)