

A054750


Smallest prime number whose digits sum to nth prime.


8



2, 3, 5, 7, 29, 67, 89, 199, 599, 2999, 4999, 29989, 59999, 79999, 389999, 989999, 6999899, 8989999, 59899999, 89999999, 289999999, 799999999, 3999998999, 19999997999, 79999999999, 399999998999, 599999899999, 999998999999
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OFFSET

1,1


COMMENTS

a(n) >= A051885(A000040(n)). Indices n for which the equality holds are listed in A055019.
a(n) >= A046864(n).  Michel Marcus, Nov 01 2015


LINKS

Table of n, a(n) for n=1..28.
Chris Caldwell and G. L. Honaker, Jr., Prime curio for 8999


EXAMPLE

E.g. a(7)=89 because 8+9=17 and 17 is the 7th prime.


PROG

(PARI) a(n) = {my(k=2); my(p=prime(n)); while((sumdigits(k) != prime(n)), k=nextprime(k+1)); k; } \\ Michel Marcus, Nov 01 2015


CROSSREFS

Cf. A000040, A067180, A046704, A046704, A046864, A068951, A007605.
Sequence in context: A046864 A090712 A082257 * A048404 A052013 A269022
Adjacent sequences: A054747 A054748 A054749 * A054751 A054752 A054753


KEYWORD

base,nonn


AUTHOR

G. L. Honaker, Jr., Apr 24 2000


EXTENSIONS

More terms from Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), May 31 2000
Edited and extended by Robert G. Wilson v, Feb 26 2002


STATUS

approved



