OFFSET
1,1
COMMENTS
See comments and references for A174213.
EXAMPLE
2^3 = 8, 81331 = prime(7958) => a(1) = 2;
6^3 = 216, 2161331 = prime(160048) => a(2) = 6.
PROG
(PARI) isok(n) = isprime(eval(concat(Str(n^3), Str(1331)))); \\ Michel Marcus, Jul 20 2017
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Eva-Maria Zschorn (e-m.zschorn(AT)zaschendorf.km3.de), Mar 13 2010
EXTENSIONS
More terms from Michel Marcus, Jul 20 2017
STATUS
approved