A071982 Parity of the decimal digits of sqrt(2).

1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1

Offset

0,1

Links

G. C. Greubel, Table of n, a(n) for n = 0..10000

Mathematica

 Table[(1 - (-1)^Floor[10^n*Sqrt[2]])/2, {n, 0, 100}] (* G. C. Greubel, Oct 01 2018 *)

Prog

(PARI) \p200 for(n=0, 150, print1((1-(-1)^floor(10^n*sqrt(2)))/2, ", "))
(PARI) a(n)=if(n<0, 0, sqrtint(2*100^n)%2)
(Magma) [(1 - (-1)^Floor(10^n*Sqrt(2)))/2: n in [0..100]]; // G. C. Greubel, Oct 01 2018

Crossrefs

Cf. A001113, A002193, A030657.

Sequence in context: A286726 A189209 A266754 * A266588 A157749 A129407

Adjacent sequences: A071979 A071980 A071981 * A071983 A071984 A071985

Keyword

easy,nonn,base

Author

Benoit Cloitre, Jun 25 2002

Status

approved