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A236012 Number of (n+1)X(2+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock 1
306, 1126, 3744, 12544, 41844, 140716, 471308, 1580152, 5294132, 17749124, 59488776, 199400040, 668327516, 2240142740, 7508500744, 25167109004, 84355063048, 282742241052, 947697217680, 3176499039060, 10647009866132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236018

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-2) +10*a(n-3) +26*a(n-4) +33*a(n-5) +11*a(n-6) -9*a(n-7) -7*a(n-8) -2*a(n-9) for n>11

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A294596 A294710 A206271 * A158589 A030030 A206679

Adjacent sequences:  A236009 A236010 A236011 * A236013 A236014 A236015

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified January 18 00:56 EST 2021. Contains 340249 sequences. (Running on oeis4.)