OFFSET
1,1
COMMENTS
Conjecture: the sequence is infinite.
LINKS
K. D. Bajpai, Table of n, a(n) for n = 1..2000
EXAMPLE
a(6)= 449 which is a prime. 21^2+pi(21) = 441 + 8 = 449.
MAPLE
with(numtheory): KD:= proc() local a, b; a:= n^2+pi(n); if isprime(a) then RETURN(a): fi; end: seq(KD(), n=1..1000);
CROSSREFS
KEYWORD
nonn
AUTHOR
K. D. Bajpai, Sep 05 2013
STATUS
approved