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 A291854 #26 Aug 02 2021 10:09:27 %S A291854 2,1,4,1,1,3,2,3,5,4,8,5,3,3,1,5,5,4,8,3,3,3,4,2,8,8,2,1,2,3,9,8,5,7, %T A291854 0,5,7,1,1,8,2,8,6,4,1,4,9,6,7,3,1,4,3,6,7,2,5,3,6,8,8,0,7,9,4,0,1,3, %U A291854 5,7,5,6,8,5,8,8,2,6,5,7,6,3,2,9,9,4,6,5,4,8,2,5,1,2,5,8,6,5,8,2,1,0,8,5 %N A291854 Decimal expansion of the "Pi AND e" (Piande) constant. %C A291854 Pi_2 = 11.00100100001111110... -> 3.1415926535897... %C A291854 e_2 = 10.10110111111000010... -> 2.7182818284590... %C A291854 Pi_2 AND e_2 = 10.00100100001000010... -> 2.1411323548533... %F A291854 Equals A059742 - A291858 = A291858 - A114916. %e A291854 2.1411323548533155483334288212398570571182864149673143672536880794... %Y A291854 Cf. A000796, A001113, A004593, A004601, A019609, A059742, A114916, A228239, A231325, A292101, A292107, A291858. %K A291854 nonn,cons,base %O A291854 1,1 %A A291854 _Alois P. Heinz_, Sep 13 2017