Voozh

A072126

Parity of the decimal digits of log(2).

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

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..104.

MATHEMATICA

Join[{0}, If[EvenQ[#], 0, 1]&/@RealDigits[Log[2], 10, 120][[1]]] (* Harvey P. Dale, Nov 27 2021 *)

PROG

(PARI) \p200 for(n=0, 150, print1((1-(-1)^floor(10^n*log(2)))/2, ", "))

CROSSREFS

Cf. A002162, A030657.

Sequence in context: A011657 A354896 A359606 * A287125 A339051 A381735