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 A237678 Number of (n+1)X(1+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock 1

%I #5 Feb 11 2014 09:53:47

%S 81,474,2741,15948,93093,541880,3152844,18356756,106893088,622285828,

%T 3622715432,21091482008,122794559800,714891615808,4162016007648,

%U 24230928689312,141070302809152,821296712783104,4781509809549568

%N Number of (n+1)X(1+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock

%C Column 1 of A237683

%H R. H. Hardin, <a href="/A237678/b237678.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 72*a(n-3) +456*a(n-4) +1084*a(n-5) +3312*a(n-6) +712*a(n-7) -9384*a(n-8) -26848*a(n-9) -73104*a(n-10) +19232*a(n-11) +112256*a(n-12) +249216*a(n-13) +378368*a(n-14) -641536*a(n-15) -627712*a(n-16) +231424*a(n-17) +372736*a(n-18)

%e Some solutions for n=5

%e ..1..1....0..0....2..1....2..0....0..0....0..2....0..2....1..2....0..0....1..2

%e ..1..2....1..1....0..0....1..1....2..1....1..2....0..2....0..1....2..0....1..0

%e ..2..0....2..2....2..0....0..0....1..0....2..1....0..0....0..1....2..2....1..0

%e ..2..2....0..2....2..1....0..2....2..2....1..1....2..1....2..1....1..0....2..2

%e ..2..2....2..1....1..0....1..2....1..1....2..0....1..0....2..0....1..2....0..0

%e ..0..1....1..1....1..0....1..2....1..2....1..0....1..0....0..2....0..2....2..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 11 2014

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Last modified July 22 08:14 EDT 2024. Contains 374481 sequences. (Running on oeis4.)