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A236705 Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the upper median minus the lower median of every 2X2 subblock 1
81, 442, 2464, 13720, 76404, 424600, 2361716, 13136192, 73071732, 406402784, 2260476660, 12572745216, 69931253876, 388958563328, 2163420804596, 12033035388224, 66928590189940, 372260237706816, 2070535450010484 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236710

LINKS

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

FORMULA

Empirical: a(n) = 34*a(n-3) +413*a(n-4) +974*a(n-5) +4004*a(n-6) +7592*a(n-7) +6608*a(n-8) +7352*a(n-9) -40208*a(n-10) -84960*a(n-11) -91776*a(n-12) -114528*a(n-13) +99776*a(n-14) +231424*a(n-15) +141312*a(n-16) +91136*a(n-17) -16384*a(n-18) -32768*a(n-19)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A270538 A230064 A236710 * A253749 A253375 A204230

Adjacent sequences:  A236702 A236703 A236704 * A236706 A236707 A236708

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2014

STATUS

approved

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Last modified July 25 03:53 EDT 2021. Contains 346283 sequences. (Running on oeis4.)