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 A249205 #18 Sep 03 2023 14:27:57 %S A249205 5,9,0,1,7,0,2,9,9,5,0,8,0,4,8,1,1,3,0,2,2,6,6,8,9,7,0,2,7,9,2,4,4,2, %T A249205 9,3,6,1,6,8,5,8,3,1,7,4,4,0,7,2,3,6,4,9,7,5,7,9,3,2,1,9,9,7,0,2,1,5, %U A249205 2,0,9,0,3,6,0,3,5,7,8,9,7,4,8,9,2,2,9,3,0,8,0,9,7,9,0,3,9,7,7,1 %N A249205 Decimal expansion of the logarithmic capacity of the unit disk. %D A249205 Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 4.9 Integer Chebyshev constants, p. 268. %H A249205 Steven Finch, <a href="/A249205/a249205.pdf">Electrical capacitance</a> [Cached copy, with permission of the author] %F A249205 Equals (1/(4*Pi^(3/2)))*Gamma(1/4)^2. %F A249205 Equals hypergeom([1/2, 1/2], [1], 1/2)/2. - _Gerry Martens_, Jul 31 2023 %e A249205 0.59017029950804811302266897027924429361685831744... %t A249205 k = (1/(4*Pi^(3/2)))*Gamma[1/4]^2; RealDigits[k, 10, 100] // First %o A249205 (PARI) (1/(4*Pi^(3/2)))*gamma(1/4)^2 \\ _Michel Marcus_, Sep 03 2023 %Y A249205 Cf. A068466, A249206, A249220. %K A249205 nonn,cons,easy %O A249205 0,1 %A A249205 _Jean-François Alcover_, Oct 23 2014