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A097209 Primes of the form (10^p + 1)/11 (corresponding p are in A001562). 1
9091, 909091, 909090909090909091, 909090909090909090909090909091, 9090909090909090909090909090909090909090909090909091, 909090909090909090909090909090909090909090909090909090909090909091 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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.

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A001562, A054416, A095372.

Sequence in context: A234339 A247991 A234532 * A015298 A157619 A233713

Adjacent sequences:  A097206 A097207 A097208 * A097210 A097211 A097212

KEYWORD

nonn

AUTHOR

Rick L. Shepherd, Jul 30 2004

STATUS

approved

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Last modified January 19 09:35 EST 2020. Contains 331048 sequences. (Running on oeis4.)