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A237843 Number of (n+1)X(1+1) 0..2 arrays with the maximum minus the lower median of every 2X2 subblock equal 1
81, 369, 1697, 8451, 43061, 224559, 1184701, 6305583, 33742677, 181259783, 976153437, 5266243663, 28444748005, 153767162615, 831710048621, 4500403551647, 24358405180597, 131864496867975, 713942568166077 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A237850
LINKS
FORMULA
Empirical: a(n) = 10*a(n-1) -10*a(n-2) -162*a(n-3) +377*a(n-4) +892*a(n-5) -2886*a(n-6) -1748*a(n-7) +9208*a(n-8) -336*a(n-9) -12832*a(n-10) +4416*a(n-11) +6144*a(n-12) -3072*a(n-13)
EXAMPLE
Some solutions for n=5
..2..0....1..2....1..2....0..2....2..0....1..0....2..1....0..0....2..0....0..1
..2..1....1..2....2..0....1..2....1..1....2..2....0..1....0..1....1..2....0..1
..1..0....2..1....2..1....2..0....0..0....1..1....2..2....1..0....1..2....1..2
..2..1....0..1....1..0....1..1....0..1....2..2....0..1....2..1....1..2....1..1
..1..0....0..1....1..2....1..2....1..0....0..1....2..1....1..1....0..1....1..2
..1..0....1..2....1..0....2..0....0..0....2..1....1..0....2..2....0..1....2..0
CROSSREFS
Sequence in context: A237850 A205917 A205909 * A205737 A236035 A236028
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 14 2014
STATUS
approved

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Last modified July 12 13:47 EDT 2024. Contains 374247 sequences. (Running on oeis4.)