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A097209 Primes of the form (10^p + 1)/11 (corresponding p are in A001562). 1

%I

%S 9091,909091,909090909090909091,909090909090909090909090909091,

%T 9090909090909090909090909090909090909090909090909091,

%U 909090909090909090909090909090909090909090909090909090909090909091

%N Primes of the form (10^p + 1)/11 (corresponding p are in A001562).

%C Equivalently, primes of the form 9090...9091 (A054416(n)-1 copies of 90 followed by 91), the subsequence of all primes in A095372.

%C These primes appear in A187614 because the decimal representation of their reciprocal contains only the digits 0, 1, 8, and 9.

%Y Cf. A001562, A054416, A095372.

%K nonn

%O 1,1

%A _Rick L. Shepherd_, Jul 30 2004

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Last modified July 21 02:02 EDT 2019. Contains 325189 sequences. (Running on oeis4.)