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A236134 Number of (n+1)X(1+1) 0..3 arrays colored with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock 1
256, 2816, 31552, 351872, 3932416, 43917824, 490505216, 5477885952, 61180809216, 683313242112, 7631647948800, 85233802444800, 951938625634304, 10631822915534848, 118742303933464576, 1326179385977864192 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236137

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +12*a(n-2) +328*a(n-3) +5216*a(n-4) +18624*a(n-5) +87168*a(n-6) +194304*a(n-7) -1173760*a(n-8) -4189696*a(n-9) -15864832*a(n-10) -40843264*a(n-11) +123420672*a(n-12) +390070272*a(n-13) +424673280*a(n-14) +1104150528*a(n-15) -2717908992*a(n-16) -8153726976*a(n-17)

EXAMPLE

Some solutions for n=3

..3..2....3..0....1..3....1..1....2..2....1..3....2..3....2..3....1..0....2..0

..0..2....1..0....1..3....0..0....1..2....2..0....3..0....3..2....2..0....3..3

..3..0....2..2....0..2....0..2....0..3....3..0....1..1....0..3....2..2....2..1

..0..1....1..3....0..3....2..3....1..3....0..1....3..2....0..0....0..0....3..0

CROSSREFS

Sequence in context: A236949 A236942 A236137 * A236588 A236585 A235818

Adjacent sequences:  A236131 A236132 A236133 * A236135 A236136 A236137

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 19 2014

STATUS

approved

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Last modified September 21 21:32 EDT 2021. Contains 347605 sequences. (Running on oeis4.)