login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A143848 Real part of x(n) defined as x(n+1)=x(n)^2+i with i=sqrt(-1), 2
1, 1, 0, -9, 80, 6111, 29951360, -207256402585089, -3919788933040280447085605363200, 14683863149476410414382246646213355893861151824423487368369151 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

A143849(n) = imaginary part of x(n).

LINKS

Table of n, a(n) for n=1..10.

FORMULA

a(n+1) = a(n)^2 - A143849(n)^2.

EXAMPLE

x starts with 1, 1+i, 3*i, -9+i, 80-17*i, 6111-2719*i, ...

CROSSREFS

A003095.

Sequence in context: A192214 A127265 A055070 * A317052 A332702 A117817

Adjacent sequences:  A143845 A143846 A143847 * A143849 A143850 A143851

KEYWORD

sign

AUTHOR

Reinhard Zumkeller, Sep 03 2008

STATUS

approved

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 July 9 22:46 EDT 2020. Contains 335570 sequences. (Running on oeis4.)