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A222128 Decimal expansion of the real part of 1/i^Pi, where i=sqrt(-1). 2
2, 2, 0, 5, 8, 4, 0, 4, 0, 7, 4, 9, 6, 9, 8, 0, 8, 8, 6, 6, 8, 9, 4, 5, 9, 1, 3, 2, 5, 5, 7, 8, 7, 5, 1, 0, 4, 5, 8, 8, 4, 8, 0, 3, 8, 1, 5, 9, 4, 1, 0, 6, 7, 2, 3, 7, 0, 0, 4, 8, 8, 7, 3, 2, 2, 4, 8, 3, 3, 5, 5, 1, 2, 5, 0, 5, 9, 5, 6, 3, 9, 7, 2, 7, 1, 1, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Also, decimal expansion of the real part of i^Pi.

LINKS

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

FORMULA

Equals cos(Pi^2/2).

EXAMPLE

0.22058404074969808866894591325578751045884803815941067237004887322...

MATHEMATICA

RealDigits[Re[1/I^Pi], 10, 90][[1]] (* or *) RealDigits[Cos[Pi^2/2], 10, 90][[1]]

PROG

(Maxima) fpprec:90; ev(bfloat(realpart(1/%i^%pi)));

CROSSREFS

Cf. A102753, A211883, A222129 (imaginary part of 1/i^Pi).

Sequence in context: A166299 A182508 A213626 * A088972 A168505 A100334

Adjacent sequences:  A222125 A222126 A222127 * A222129 A222130 A222131

KEYWORD

nonn,cons

AUTHOR

Bruno Berselli, Feb 08 2013

STATUS

approved

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Last modified July 25 18:14 EDT 2017. Contains 289796 sequences.