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 A127766 #11 Jul 26 2020 09:07:24
%S A127766 1,12,61,210,561,1265,2532,4641,7941,12868,19946,29796,43144,60828,
%T A127766 83804,113155,150095,195980,252310,320738,403077,501308,617581,754227,
%U A127766 913762,1098894,1312530,1557780,1837964,2156622,2517514,2924630,3382196
%N A127766 Integer part of Gauss's Arithmetic-Geometric Mean M(2,n^5).
%F A127766 a(n) ~ Pi*n^5/(10*log(n) + 2*log(2)). - _Vaclav Kotesovec_, May 09 2016
%t A127766 Table[Floor[ArithmeticGeometricMean[2, n^5]], {n, 1, 100}]
%Y A127766 Cf. A127758, A127759, A127760, A127761, A127762, A127763, A127764, A127765.
%K A127766 nonn
%O A127766 1,2
%A A127766 _Artur Jasinski_, Jan 28 2007