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A237162 Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock equal 1
777, 4365, 25705, 165317, 1096689, 7519165, 52597313, 374547449, 2703084433, 19737083525, 145502365817, 1081741294293, 8100825186441, 61057811296633, 462839372387297, 3526509645691173, 26993284905141665, 207478208405676469 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A237167
LINKS
FORMULA
Empirical: a(n) = 22*a(n-1) -99*a(n-2) -960*a(n-3) +8098*a(n-4) +12032*a(n-5) -218957*a(n-6) +19862*a(n-7) +3162005*a(n-8) -1747808*a(n-9) -28052026*a(n-10) +17465512*a(n-11) +161713315*a(n-12) -88019074*a(n-13) -621523196*a(n-14) +264308654*a(n-15) +1611400334*a(n-16) -500177858*a(n-17) -2823868897*a(n-18) +607262224*a(n-19) +3318019822*a(n-20) -470911456*a(n-21) -2561669588*a(n-22) +227604704*a(n-23) +1252643832*a(n-24) -64982496*a(n-25) -364185088*a(n-26) +9789184*a(n-27) +55881600*a(n-28) -579072*a(n-29) -3354624*a(n-30)
EXAMPLE
Some solutions for n=4
..1..0..1..0....1..0..1..0....0..1..0..1....1..0..1..1....1..1..2..2
..0..1..2..1....0..0..0..2....1..2..1..0....2..1..2..2....1..1..0..0
..0..1..0..1....2..1..0..1....0..1..0..1....1..0..1..1....1..1..0..0
..2..1..2..1....0..0..0..0....1..0..1..0....2..1..0..2....1..1..0..0
..0..1..0..1....1..0..1..2....0..1..0..1....0..1..2..0....0..0..1..1
CROSSREFS
Sequence in context: A204300 A043519 A043384 * A252529 A008746 A231062
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 04 2014
STATUS
approved

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)