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Search: id:A099665
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A099665 a[n] is the largest prime before A002279[n] repdigits. +0
1
3, 53, 547, 5531, 55547, 555523, 5555527, 55555553, 555555541, 5555555519, 55555555543, 555555555551, 5555555555551, 55555555555541, 555555555555529, 5555555555555539, 55555555555555519, 555555555555555487 (list; graph; listen)
OFFSET

1,1

EXAMPLE

n=2: 53 is before 55.

MATHEMATICA

<<NumberTheory`NumberTheoryFunctions` Table[Table[PreviousPrime[5*(10^n-1)/9], {n, 1, 35}]

CROSSREFS

Cf. A003618, A003617, A096497, A096498, A068104, A002275-A002283, A099656-A099668.

Sequence in context: A036941 A113612 A121504 this_sequence A001279 A092447 A012742

Adjacent sequences: A099662 A099663 A099664 this_sequence A099666 A099667 A099668

KEYWORD

base,nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Nov 17 2004

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.


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