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

9091, 909091, 909090909090909091, 909090909090909090909090909091, 9090909090909090909090909090909090909090909090909091, 909090909090909090909090909090909090909090909090909090909090909091

Offset: 1

Author

Rick L. Shepherd, Jul 30 2004

Keywords

• nonn

Comments

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

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

Crossrefs

Cf. A001562, A054416, A095372.