0,2

A real number is said to be evil if the cumulative sum of its digits following the decimal point 'hits' the value 666. It is amazing how close this value is to 1/5 (the difference is in A271881).

Stanislav Sykora, Table of n, a(n) for n = 0..2000

Eric Weisstein's World of Mathematics, Evil Number

Equals A100061(666)/A100062(666).

0.19999999999999999999999999999999999999999999999999999999999999978337...

(PARI) 0.0 + Vec(Ser((1-x^9)/(x^10-10*x+9), x, 666))[666]

Cf. A100061, A100062, A271881.

Sequence in context: A137577 A099646 A181693 * A010734 A180599 A066568

Adjacent sequences: A271877 A271878 A271879 * A271881 A271882 A271883

nonn,cons,base

Stanislav Sykora, Apr 16 2016

approved