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A236134 Number of (n+1)X(1+1) 0..3 arrays colored with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock 1

%I

%S 256,2816,31552,351872,3932416,43917824,490505216,5477885952,

%T 61180809216,683313242112,7631647948800,85233802444800,

%U 951938625634304,10631822915534848,118742303933464576,1326179385977864192

%N Number of (n+1)X(1+1) 0..3 arrays colored with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock

%C Column 1 of A236137

%H R. H. Hardin, <a href="/A236134/b236134.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +12*a(n-2) +328*a(n-3) +5216*a(n-4) +18624*a(n-5) +87168*a(n-6) +194304*a(n-7) -1173760*a(n-8) -4189696*a(n-9) -15864832*a(n-10) -40843264*a(n-11) +123420672*a(n-12) +390070272*a(n-13) +424673280*a(n-14) +1104150528*a(n-15) -2717908992*a(n-16) -8153726976*a(n-17)

%e Some solutions for n=3

%e ..3..2....3..0....1..3....1..1....2..2....1..3....2..3....2..3....1..0....2..0

%e ..0..2....1..0....1..3....0..0....1..2....2..0....3..0....3..2....2..0....3..3

%e ..3..0....2..2....0..2....0..2....0..3....3..0....1..1....0..3....2..2....2..1

%e ..0..1....1..3....0..3....2..3....1..3....0..1....3..2....0..0....0..0....3..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 19 2014

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Last modified October 16 22:31 EDT 2021. Contains 348047 sequences. (Running on oeis4.)