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A236028 Number of (n+1)X(1+1) 0..2 arrays colored with the difference of the upper median and the lower median in each 2X2 subblock 1
81, 384, 1848, 8856, 42724, 205660, 990076, 4760380, 22914572, 110251484, 530698540, 2553224764, 12288328268, 59125817692, 284558412524, 1369212514940, 6589395415436, 31707191199388, 152589046499116, 734250990732732 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A236035
LINKS
FORMULA
Empirical: a(n) = 9*a(n-2) +4*a(n-3) +192*a(n-4) +324*a(n-5) +696*a(n-6) +1808*a(n-7) +1312*a(n-8) +1152*a(n-9) +1024*a(n-10)
EXAMPLE
Some solutions for n=5
..0..0....1..1....1..0....1..2....2..2....1..0....2..2....0..1....2..2....1..2
..0..1....0..0....1..0....0..0....1..2....2..2....0..2....2..2....0..1....0..1
..2..2....0..0....0..0....2..2....1..2....2..2....2..0....0..2....0..0....1..0
..0..2....2..2....2..2....2..2....0..1....0..0....1..1....0..1....2..2....1..2
..2..0....2..1....0..1....0..0....2..2....0..0....0..0....1..2....1..2....0..0
..2..1....0..2....0..0....0..2....0..2....1..2....2..2....2..1....2..0....2..0
CROSSREFS
Sequence in context: A237843 A205737 A236035 * A233157 A237108 A237101
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 18 2014
STATUS
approved

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Last modified May 27 14:41 EDT 2024. Contains 372861 sequences. (Running on oeis4.)