This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A222131 #13 Mar 26 2013 03:57:27 %S A222131 9,1,0,5,9,8,4,9,9,2,1,2,6,1,4,7,0,7,0,6,0,0,4,4,5,1,4,2,3,6,8,7,7,4, %T A222131 7,4,5,1,4,9,2,9,0,5,3,3,7,7,5,2,0,2,0,7,1,9,6,1,6,4,2,7,9,5,5,9,3,4, %U A222131 5,6,9,3,5,7,5,9,3,1,7,9,8,1,5,9,4,6,4 %N A222131 Decimal expansion of the imaginary part of Pi^i, where i=sqrt(-1). %H A222131 Vincenzo Librandi, <a href="/A222131/b222131.txt">Table of n, a(n) for n = 0..5000</a> %F A222131 Equals sin(log(Pi)) = (Pi^i-1/Pi^i)/(2*i). %e A222131 0.910598499212614707060044514236877474514929053377520207196164279559... %t A222131 RealDigits[Im[Pi^I], 10, 90][[1]] (* or *) RealDigits[Sin[Log[Pi]], 10, 90][[1]] %o A222131 (Maxima) fpprec:90; ev(bfloat(imagpart(%pi^%i))); %Y A222131 Cf. A053510, A049469 (imaginary part of e^i), A222130 (real part of Pi^i). %K A222131 nonn,cons %O A222131 0,1 %A A222131 _Bruno Berselli_, Feb 08 2013