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

 

Logo

The October issue of the Notices of the Amer. Math. Soc. has an article about the OEIS.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A222130 Decimal expansion of the real part of Pi^i, where i=sqrt(-1). 2
4, 1, 3, 2, 9, 2, 1, 1, 6, 1, 0, 1, 5, 9, 4, 3, 3, 6, 6, 2, 6, 6, 2, 8, 3, 9, 4, 2, 7, 6, 6, 9, 7, 5, 6, 4, 9, 8, 5, 5, 9, 0, 6, 8, 7, 0, 8, 3, 5, 4, 5, 0, 8, 2, 8, 7, 1, 9, 7, 6, 6, 4, 2, 4, 7, 7, 2, 3, 8, 9, 0, 6, 3, 0, 3, 4, 8, 5, 5, 4, 3, 3, 5, 6, 4, 2, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..5000

FORMULA

Equals cos(log(Pi)) = (Pi^i+1/Pi^i)/2.

EXAMPLE

0.41329211610159433662662839427669756498559068708354508287197664247...

MATHEMATICA

RealDigits[Re[Pi^I], 10, 90][[1]] (* or *) RealDigits[Cos[Log[Pi]], 10, 90][[1]]

PROG

(Maxima) fpprec:90; ev(bfloat(realpart(%pi^%i)));

CROSSREFS

Cf. A053510, A049470 (real part of e^i), A222131 (imaginary part of Pi^i).

Sequence in context: A019633 A067277 A177951 * A061903 A084118 A046071

Adjacent sequences:  A222127 A222128 A222129 * A222131 A222132 A222133

KEYWORD

nonn,cons

AUTHOR

Bruno Berselli, Feb 08 2013

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 25 21:12 EDT 2018. Contains 315425 sequences. (Running on oeis4.)