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A184451 1/36 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last 1

%I #5 Mar 31 2012 12:36:00

%S 864,1591,3125,6880,20706,67180,232326,967138,4023354,16410550,

%T 76004286,342234442,1471593474,7091681506,32977550190,145061691070,

%U 712044245886,3363409747810,14962231319346,74119694182018,352903456485534

%N 1/36 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last

%C Column 3 of A184457

%H R. H. Hardin, <a href="/A184451/b184451.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n)=6*a(n-1)-11*a(n-2)+195*a(n-3)-1134*a(n-4)+2079*a(n-5)-11600*a(n-6)+62796*a(n-7)-115126*a(n-8)+263520*a(n-9)-1204344*a(n-10)+2207964*a(n-11)-2907648*a(n-12)+10219824*a(n-13)-18736344*a(n-14)+17243280*a(n-15)-42140736*a(n-16)+77258016*a(n-17)-55857600*a(n-18)+82301184*a(n-19)-150885504*a(n-20)+92378880*a(n-21)-60466176*a(n-22)+110854656*a(n-23)-60466176*a(n-24)

%e Some solutions with a(1,1)=0 for 4X5

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 14 2011

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Last modified April 20 17:12 EDT 2024. Contains 371845 sequences. (Running on oeis4.)