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A236083 Number of (n+1)X(1+1) 0..3 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock 1
256, 2400, 22506, 211560, 1998580, 18841712, 177646290, 1674513256, 15787986826, 148843166800, 1403280508044, 13229588080992, 124726066140698, 1175883681522224, 11085965466380794, 104515595490058104 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A236087
LINKS
FORMULA
Empirical: a(n) = 224*a(n-3) +2810*a(n-4) +13856*a(n-5) +90672*a(n-6) +291072*a(n-7) +952484*a(n-8) +1912080*a(n-9) -1157526*a(n-10) -12079672*a(n-11) -80765163*a(n-12) -186815512*a(n-13) -311515244*a(n-14) -242959664*a(n-15) +1413551712*a(n-16) +3132342592*a(n-17) +6646937984*a(n-18) +3604272384*a(n-19) -10896930560*a(n-20) -17680504832*a(n-21) -26707124224*a(n-22) +5417844736*a(n-23) +14742724608*a(n-24) +16130326528*a(n-25) +19947962368*a(n-26) -13724549120*a(n-27) +9831972864*a(n-28) -12022972416*a(n-29)
EXAMPLE
Some solutions for n=3
..0..3....2..3....2..3....3..0....1..0....0..2....2..3....0..3....1..0....3..2
..2..3....2..2....0..1....3..1....3..3....2..3....1..0....1..0....3..2....1..2
..0..2....3..3....0..1....0..0....1..3....2..3....1..2....0..0....3..2....3..0
..0..0....0..3....3..2....3..0....1..1....0..3....3..0....1..1....3..0....3..0
CROSSREFS
Sequence in context: A235261 A236087 A204303 * A016780 A236041 A236037
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 19 2014
STATUS
approved

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Last modified June 21 21:50 EDT 2024. Contains 373559 sequences. (Running on oeis4.)