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 A243268 #10 Jul 23 2025 11:19:54 %S A243268 0,8,9,4,8,9,8,7,2,2,3,6,0,8,3,6,3,5,1,1,6,0,1,4,4,2,2,9,1,2,4,5,4,8, %T A243268 7,0,7,3,1,9,4,8,7,1,0,4,8,2,1,8,3,0,7,3,4,1,7,2,5,1,8,5,2,8,8,4,1,5, %U A243268 1,8,5,1,8,5,2,5,2,1,9,2,9,5,3,8,8,3,4,1,7,3,9,7,4,7,0,5,2,1 %N A243268 Decimal expansion of 1/2-G/Pi, the lowest limiting trough of a square wave Fourier series, where G is the Gibbs-Wilbraham constant. [negated]. %D A243268 Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 4.1 Gibbs-Wilbraham constant, p. 249. %H A243268 Eric Weisstein's MathWorld, <a href="https://mathworld.wolfram.com/Wilbraham-GibbsConstant.html">Wilbraham-Gibbs Constant</a> %e A243268 -0.08948987223608363511601442291245487... %t A243268 G = SinIntegral[Pi]; RealDigits[1/2 - G/Pi, 10, 97] // First %Y A243268 Cf. A036792, A036793, essentially the same as A243267. %K A243268 nonn,cons %O A243268 0,2 %A A243268 _Jean-François Alcover_, Jun 02 2014