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 A073070 #14 Oct 02 2018 02:41:44 %S A073070 0,1,1,0,1,0,1,0,1,1,0,1,0,1,0,1,0,0,0,0,1,1,0,1,0,1,1,0,0,1,1,0,1,0, %T A073070 1,0,1,1,0,1,0,1,0,0,1,1,0,1,0,0,0,0,1,1,1,1,1,0,1,1,0,1,0,1,1,0,0,0, %U A073070 1,0,0,1,0,0,1,1,0,1,1,1,0,1,1,0,1,0,1,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,1 %N A073070 Binary expansion of 1/AGM(1,sqrt(2)). %H A073070 G. C. Greubel, <a href="/A073070/b073070.txt">Table of n, a(n) for n = 1..10000</a> %t A073070 1/ArithmeticGeometricMean[1, Sqrt[2]] // RealDigits[#, 2, 104]& // First // Prepend[#, 0]& (* _Jean-François Alcover_, Mar 04 2013 *) %o A073070 (PARI) a(n)=2^(n-1)\agm(sqrt(2),1)%2 \\ _Charles R Greathouse IV_, Mar 03 2016 %Y A073070 Cf. A014549. %K A073070 base,cons,nonn %O A073070 1,1 %A A073070 _Benoit Cloitre_, Aug 17 2002