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 A127762 #11 Jul 26 2020 09:05:40
%S A127762 1,2,4,7,10,13,16,20,25,29,34,39,45,51,57,64,71,78,86,93,102,110,119,
%T A127762 128,137,147,157,167,177,188,199,210,222,234,246,258,271,284,297,311,
%U A127762 325,339,353,368,382,398,413,429,444,461,477,494,511,528,545,563,581
%N A127762 Integer part of Gauss's Arithmetic-Geometric Mean M(2,n^2).
%F A127762 a(n) ~ Pi*n^2/(4*log(n) + 2*log(2)). - _Vaclav Kotesovec_, May 09 2016
%t A127762 Table[Floor[ArithmeticGeometricMean[2, n^2]], {n, 1, 100}]
%Y A127762 Cf. A127758, A127759, A127760, A127761, A127763, A127764, A127765, A127766.
%K A127762 nonn
%O A127762 1,2
%A A127762 _Artur Jasinski_, Jan 28 2007