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 A196197 Successive values of variable in iterative system. See formula. 1

%I #12 May 13 2013 01:49:56

%S 1,2,46,9524,668167328,2659622445121618432,

%T 49010511918326168029213178565961711616,

%U 16062797652514333892481251366398766288832009528055271611504951962161641422848

%N Successive values of variable in iterative system. See formula.

%F Successive values of e in iterative system (LHS subscript for a-e is _n+1, RHS subscript for a-e is _n): a = 2ad + bd; b = 2ae + bd + be + 2cd + ce; c = be + ce; d = 2ad + 2ae + bd + be + ce; e = bd + be + 2cd + ce. The initial values for the system are a=b=d=e=1, c=0.

%o (PARI) v=[1,1,0,1,1];for(n=1,10,a=v[1];b=v[2];c=v[3];d=v[4];e=v[5];print1(e", ");v=[2*a*d+b*d,2*a*e+b*d+b*e+2*c*d+c*e,b*e+c*e,2*a*d+2*a*e+b*d+b*e+c*e,b*d+b*e+2*c*d+c*e]) \\ _Charles R Greathouse IV_, Sep 29 2011

%K nonn

%O 1,2

%A _Daniel Tisdale_, Sep 29 2011

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Last modified July 17 05:50 EDT 2024. Contains 374360 sequences. (Running on oeis4.)