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 A084897 #28 Feb 16 2025 08:32:50 %S A084897 2,6,0,4,0,0,8,1,9,0,5,3,0,9,4,0,2,8,8,6,9,6,4,2,7,4,4,8,7,2,5,0,3,4, %T A084897 3,3,0,9,2,7,0,6,5,2,5,5,6,3,7,6,4,9,4,8,7,7,4,8,4,1,3,2,5,4,4,5,5,6, %U A084897 7,9,2,8,0,5,6,8,5,1,8,5,2,6,9,5,6,1,2,1,1,1,6,8,5,4,3,2,8,8,5,5,4,4 %N A084897 Decimal expansion of agm(1,5), the arithmetic-geometric mean of 1 and 5. %H A084897 Ivan Panchenko, <a href="/A084897/b084897.txt">Table of n, a(n) for n = 1..1000</a> %H A084897 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Arithmetic-GeometricMean.html">Arithmetic-Geometric Mean</a> %e A084897 2.6040081905309402886964274487250343309270652556376494877484132544556792805685... %t A084897 RealDigits[ArithmeticGeometricMean[1, 5], 10, 120][[1]] (* _Vincenzo Librandi_, Mar 12 2015 *) %t A084897 RealDigits[N[3Pi/(2EllipticK[4/9]), 102]][[1]] (* _Jean-François Alcover_, Jun 02 2019 *) %o A084897 (PARI) agm(1, 5) \\ _Michel Marcus_, Jun 02 2019 %Y A084897 Cf. A068521 (agm(1,2)), A084895 (agm(1,3)), A084896 (agm(1,4)). %K A084897 nonn,cons,easy %O A084897 1,1 %A A084897 _Eric W. Weisstein_, Jun 10 2003