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A196197
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Successive values of variable in iterative system. See formula.
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1
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1, 2, 46, 9524, 668167328, 2659622445121618432, 49010511918326168029213178565961711616, 16062797652514333892481251366398766288832009528055271611504951962161641422848
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OFFSET
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1,2
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LINKS
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FORMULA
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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.
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PROG
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(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
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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