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!)
A219781 Decimal expansion of Sum_{n = -infinity..infinity} 5^(n/2)*((1+sqrt(5))/2)^(-n^2). 2

%I #22 Jul 14 2014 12:24:09

%S 3,5,7,6,9,7,2,7,4,8,1,3,1,6,9,4,8,5,6,5,3,9,5,1,9,7,8,4,8,5,6,3,7,4,

%T 5,3,7,5,2,8,4,0,5,3,6,5,2,3,5,2,2,2,3,0,7,7,3,6,9,7,2,7,3,7,6,1,2,6,

%U 1,7,5,8,2,7,8,1,1,1,2,7,1,7,5,7,3,0,2

%N Decimal expansion of Sum_{n = -infinity..infinity} 5^(n/2)*((1+sqrt(5))/2)^(-n^2).

%C Constant is associated with A135961.

%e 3.5769727481316948565395...

%t RealDigits[N[Sum[5^(k/2)*((1+Sqrt[5])/2)^(-k^2), {k,-Infinity,Infinity}], 131], 10, 130][[1]]

%Y Cf. A135961, A135741.

%K nonn,cons

%O 1,1

%A _Vaclav Kotesovec_, Nov 29 2012

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 April 19 08:45 EDT 2024. Contains 371782 sequences. (Running on oeis4.)