OFFSET
1,1
COMMENTS
a(n) is always less than or equal to n-th prime and once past a(6) it is always less than n.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
a = {}; Do[k = 2; p = Prime[n]; While[ PrimeQ[ FromDigits[ Reverse[ IntegerDigits[p, k]], k]], k++ ]; a = Append[a, k], {n, 1, 105}]; a
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Robert G. Wilson v, Sep 09 2002
STATUS
approved