login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A184450 1/36 the number of (n+2)X4 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 234,600,1591,4517,16029,58413,216477,930657,3947025,16260821,

%T 75637161,341430753,1469964069,7087591425,32968435401,145042964117,

%U 711996798489,3363303213633,14962011182037,74119134136017,352902194702745

%N 1/36 the number of (n+2)X4 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last

%C Column 2 of A184457

%H R. H. Hardin, <a href="/A184450/b184450.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 6X4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 14 2011

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 23 22:58 EST 2024. Contains 370288 sequences. (Running on oeis4.)