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A099082 Numbers n such that 1.2. ... .n-1.n + 2 is prime (dot between numbers means concatenation). 3
1, 5, 9, 11, 65, 159 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Next term is greater than 2000.

LINKS

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

EXAMPLE

9 is in the sequence because 123456789+2 is prime.

CROSSREFS

Cf. A099081, A099083.

Sequence in context: A288143 A120228 A053749 * A062217 A190691 A135979

Adjacent sequences:  A099079 A099080 A099081 * A099083 A099084 A099085

KEYWORD

base,more,nonn

AUTHOR

Farideh Firoozbakht, Oct 23 2004

STATUS

approved

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Last modified October 20 15:40 EDT 2017. Contains 293619 sequences.