login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A159994 Numerator of f(A159992(n)/A159993(n)) with f(x)=x^3+2*x^2+10*x-20, denominator=A159995. 4

%I

%S -7,-1219,-193885217,-2512095067,-10152983807749,-249880575515347,

%T -2950249420928771944181,-5129149052857317896107,

%U -1247467412339070464235923,-16941291362994850503969493637

%N Numerator of f(A159992(n)/A159993(n)) with f(x)=x^3+2*x^2+10*x-20, denominator=A159995.

%C a(n)/A159995(n) = f(A159992(n)/A159993(n));

%C a(n)/A159995(n) < 0; a(n)/A159995(n) <= a(n+1)/A159995(n+1);

%C a(n)/A159995(n) --> 0.

%H R. Zumkeller, <a href="/A159994/b159994.txt">Table of n, a(n) for n = 0..30</a>

%e a(0)/A159995(0)=-7;

%e a(1)/A159995(1)=-1216/27000;

%e a(2)/A159995(2)=-193885217/46656000000;

%e a(3)/A159995(3)=-2512095067/46656000000000;

%e a(4)/A159995(4)=-10152983807749/80621568000000000000;

%e a(5)/A159995(5)=-249880575515347/14348907000000000000000;

%e a(6)/A159995(6)=-2950249420928771944181/12694994583552000000000000000000;

%e a(7)/A159995(7)=-5129149052857317896107/812479653347328000000000000000000;

%e a(8)/A159995(8)=-1247467412339070464235923/37907050706572935168000000000000000000;

%e written as decimal fractions:

%e a(1)/A159995(1) ~= -0.045037037037037037037037;

%e a(2)/A159995(2) ~= -0.004155633080418381344307;

%e a(3)/A159995(3) ~= -0.000053842915530692729766;

%e a(4)/A159995(4) ~= -0.000000125933842017920068;

%e a(5)/A159995(5) ~= -0.000000017414606946392990;

%e a(6)/A159995(6) ~= -0.000000000232394697099847;

%e a(7)/A159995(7) ~= -0.000000000006312956923568;

%e a(8)/A159995(8) ~= -0.000000000000032908585318.

%Y A159990.

%K frac,sign

%O 0,1

%A _Reinhard Zumkeller_, May 01 2009

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 19 12:57 EDT 2019. Contains 327198 sequences. (Running on oeis4.)