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 A114864 #12 Feb 16 2025 08:33:00
%S A114864 9,8,1,7,5,5,0,1,3,0,1,0,7,1,1,7,3,9,7,2,0,4,8,8,1,6,6,4,9,9,3,7,7,7,
%T A114864 8,3,5,9,6,5,7,9,8,0,2,3,3,0,2,1,7,0,5,3,5,2,3,5,6,3,6,2,6,9,3,5,8,2,
%U A114864 7,4,8,5,3,5,8,5,2,7,0,5,1,0,7,4,3,3,6,8,5,8,6,4,2,2,9,2,0,6,2,2,9,9
%N A114864 Decimal expansion of EulerGamma/2 + log(2).
%C A114864 Also, decimal expansion of -Integral_{x=0..1} log(InverseErf(x)) dx.
%H A114864 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/InverseErf.html">Inverse Erf</a>
%e A114864 0.981755013...
%t A114864 RealDigits[EulerGamma/2 + Log[2], 10, 100][[1]] (* _Vaclav Kotesovec_, Aug 15 2015 *)
%o A114864 (PARI) Euler/2+log(2) \\ _Charles R Greathouse IV_, Aug 04 2020
%K A114864 nonn,cons
%O A114864 0,1
%A A114864 _Eric W. Weisstein_, Jan 02 2006