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A085299 a(n) is the smallest number x such that A085298[x]=n, or 0 if no such number exists. 1
1, 8, 47, 18, 14, 89, 10, 9, 48, 16, 23, 17, 168, 268, 15, 661, 50, 380, 84, 116, 360, 245, 29, 144, 345, 227, 785, 261, 148, 235, 691, 658, 638, 40, 1023, 674, 1529, 210, 19, 81, 181, 428, 170, 1130, 2322, 406, 600, 373, 958, 217 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

EXAMPLE

a(13) = 168 means that 13 is the smallest exponent such that reversed[p(168)^13] = reversed[997^13] = 776831144302925059735912605306533496169

is prime if read in this direction and 13th prime-power if read backwards.

CROSSREFS

Cf. A085298, A057708, A058993, A056994, A059695, A003459, A007500, A055387, A061461, A068652.

Sequence in context: A141788 A317224 A132113 * A160640 A230622 A026983

Adjacent sequences:  A085296 A085297 A085298 * A085300 A085301 A085302

KEYWORD

base,nonn

AUTHOR

Labos Elemer, Jun 24 2003

STATUS

approved

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Last modified June 16 14:56 EDT 2019. Contains 324152 sequences. (Running on oeis4.)