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A057662 Smallest prime q(n) such that q(n)+2^p(n) is a prime, where p(n) is the n-th prime. 2
3, 3, 5, 3, 5, 17, 29, 53, 11, 11, 11, 29, 71, 29, 5, 5, 131, 197, 3, 11, 29, 23, 89, 29, 359, 149, 239, 239, 881, 281, 29, 3449, 197, 683, 389, 683, 101, 1283, 83, 191, 1181, 197, 5, 71, 107, 101, 71, 4001, 1433, 251, 431, 29, 1361, 89, 509, 83, 2459, 941, 101, 197 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

n=6, p(6)=13, 8192+17=8209 is a prime but 8192+2,8182+3,...,8192+13 are not, so a(6)=17

LINKS

Table of n, a(n) for n=0..59.

FORMULA

a(n)=A056206[A000040(n)]

CROSSREFS

A056206, A056208.

Sequence in context: A239931 A033558 A046217 * A015971 A163167 A243729

Adjacent sequences:  A057659 A057660 A057661 * A057663 A057664 A057665

KEYWORD

nonn

AUTHOR

Labos Elemer, Oct 16 2000

STATUS

approved

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Last modified August 1 00:13 EDT 2021. Contains 346377 sequences. (Running on oeis4.)