A073070 Binary expansion of 1/AGM(1,sqrt(2)).

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, 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, 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

Offset: 1

Author

Benoit Cloitre, Aug 17 2002

Keywords

• base
• cons
• nonn

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A014549.

Programs

Mathematica

1/ArithmeticGeometricMean[1, Sqrt[2]] // RealDigits[#, 2, 104]& // First // Prepend[#, 0]& (* Jean-François Alcover, Mar 04 2013 *)

PARI

a(n)=2^(n-1)\agm(sqrt(2),1)%2 \\ Charles R Greathouse IV, Mar 03 2016