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A237101 Number of (n+1)X(1+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock equal 1
81, 385, 1881, 9491, 48569, 252415, 1324297, 7013479, 37376009, 200312023, 1077728201, 5817662711, 31477339337, 170637062839, 926272600521, 5033545168183, 27374673893833, 148966846198839, 811006553994697 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A237108
LINKS
FORMULA
Empirical: a(n) = 9*a(n-1) -166*a(n-3) +224*a(n-4) +820*a(n-5) -1088*a(n-6) -1608*a(n-7) +1712*a(n-8) +1280*a(n-9) -832*a(n-10) -320*a(n-11)
EXAMPLE
Some solutions for n=5
..1..0....1..2....1..1....0..2....0..1....1..1....0..0....1..2....1..2....1..2
..2..2....0..1....2..2....0..1....1..0....0..1....0..1....0..2....1..2....2..1
..2..2....0..0....0..1....2..1....1..0....2..2....2..0....2..0....2..2....0..2
..1..0....1..2....1..0....0..1....0..1....2..2....1..1....2..2....0..0....0..2
..2..2....1..0....1..0....2..1....1..1....1..1....1..2....0..0....2..2....2..1
..0..1....2..1....1..0....0..1....1..1....0..0....0..0....0..0....1..1....0..2
CROSSREFS
Sequence in context: A236028 A233157 A237108 * A236618 A236611 A236719
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 03 2014
STATUS
approved

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Last modified April 20 09:51 EDT 2024. Contains 371801 sequences. (Running on oeis4.)