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 A179311 #31 Jun 14 2019 22:54:15 %S A179311 0,0,3,3,0,0,2,2,3,6,8,5,3,2,4,1,0,2,8,7,4,2,1,7,1,1,4,2,1,0,1,3,4,5, %T A179311 6,5,9,7,1,4,8,9,6,4,7,2,4,0,2,7,8,3,5,5,0,2,4,6,9,2,3,9,6,1,6,2,9,3, %U A179311 1,6,7,6,4,1,1,6 %N A179311 Decimal expansion of the real part of zeta(i), where i = sqrt(-1). %C A179311 With zeta being the Riemann zeta function. Also the real part of zeta(-i). Bhatt's documentation for MathTools incorrectly identifies this constant as the real part of zeta(1 - i) (however the other example zeta values given are correct). %H A179311 Bhuvanesh Bhatt, <a href="http://www.ibiblio.org/technicalc/packages/mathtools/MathTools.pdf">Documentation for MathTools</a>, p. 32. %e A179311 zeta(i) = 0.00330022 - 0.41815545i (to eight decimal places on both parts). %t A179311 RealDigits[N[Re[Zeta[I]], 75]][[1]] %o A179311 (PARI) real(zeta(I)) \\ _Michel Marcus_, Jun 14 2019 %Y A179311 Cf. A179836 (imaginary part). %K A179311 nonn,cons %O A179311 0,3 %A A179311 _Alonso del Arte_, Jan 07 2011