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 A074957 #28 Feb 16 2025 08:32:47 %S A074957 2,9,2,6,1,0,8,5,5,1,5,7,2,3,0,4,6,9,6,6,6,5,8,9,5,7,1,0,1,7,0,5,5,8, %T A074957 5,3,1,0,6,6,2,0,5,7,5,5,3,7,9,8,4,5,6,2,7,4,4,2,4,1,5,5,1,2,4,2,1,5, %U A074957 2,6,8,6,8,5,1,1,9,8,6,4,4,5,1,9,3,9,4,0,9,3,5,4,6,3,2,2,7,4,5,6,4,1,8,3,1 %N A074957 Decimal expansion of the arithmetic-geometric mean (AGM) of Pi and e. %H A074957 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Arithmetic-GeometricMean.html">Arithmetic-Geometric Mean</a>. %H A074957 Wikipedia, <a href="https://en.wikipedia.org/wiki/Arithmetic%E2%80%93geometric_mean">Arithmetic-geometric mean</a> %e A074957 AGM(Pi,e) = 2.926108551572304696665895710170558531... %p A074957 evalf(GaussAGM(Pi, exp(1)), 144); # _Alois P. Heinz_, Jul 05 2023 %t A074957 RealDigits[ArithmeticGeometricMean[Pi, E], 10, 100][[1]] (* _Amiram Eldar_, May 31 2021 *) %o A074957 (PARI) agm(exp(1),Pi) \\ _Charles R Greathouse IV_, Mar 03 2016 %Y A074957 Cf. A000796, A001113. %K A074957 nonn,cons %O A074957 1,1 %A A074957 _Zak Seidov_, Oct 05 2002