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 A245533 #7 Jul 25 2014 13:38:15 %S A245533 8,2,4,7,8,3,0,3,0,9,1,4,6,2,2,4,9,6,5,7,1,9,3,7,6,6,0,1,9,9,3,2,8,3, %T A245533 1,8,6,9,3,7,8,9,6,1,3,3,3,0,8,7,2,0,6,7,1,0,8,4,6,4,7,5,8,2,7,0,7,5, %U A245533 1,9,3,5,0,7,2,8,5,5,4,4,2,7,8,9,7,1,7,8,9,4,5,7,1,4,5,9,1,3,8,9,9,1,4,5 %N A245533 Decimal expansion of sigma_3, a Turán's Power Sum Constant. %D A245533 Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 3.16 Turán's Power Sum Constants, p. 246. %F A245533 Smallest positive root of the minimal polynomial given in the Mathematica code. %e A245533 0.82478303091462249657193766019932831869378961333087206710846475827... %t A245533 sigma3 = Root[x^30 - 81*x^28 + 2613*x^26 - 43629*x^24 + 417429*x^22 - 2450985*x^20 + 9516137*x^18 - 26203659*x^16 + 53016480 x^14 - 83714418*x^12 + 112601340*x^10 - 140002992*x^8 + 156204288*x^6 - 124361568*x^4 + 55427328*x^2 - 10077696, x, 6]; RealDigits[sigma3, 10, 104] // First %Y A245533 Cf. A094883. %K A245533 nonn,cons %O A245533 0,1 %A A245533 _Jean-François Alcover_, Jul 25 2014