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 A099287 #4 Jul 29 2021 04:51:36 %S A099287 1,5,7,2,9,9,2,0,7,0,5,0,2,8,5,1,3,0,6,5,8,7,7,9,3,6,4,9,1,7,3,9,0,7, %T A099287 4,0,7,0,3,9,3,3,0,0,2,0,3,3,6,9,7,0,9,1,5,4,0,0,6,2,1,0,2,1,6,5,2,8, %U A099287 2,7,4,5,9,0,3,9,8,9,1,5,8,7,3,8,0,1,6,6,7,4,6,5,1,8,5,5,1,1,1,5,4,5,8,4 %N A099287 Decimal expansion of the complementary error function at 1. %F A099287 1-A099286. %e A099287 0.157299207050285130658779364917390740703933002033697091540062102165... %t A099287 RealDigits[ Erfc[1], 10, 105][[1]] %K A099287 cons,nonn %O A099287 0,2 %A A099287 _Robert G. Wilson v_, Oct 11 2004