OFFSET
1,2
EXAMPLE
n=1: perfect_power(1)+perfect_power(2)=1+4=5 is prime.
n=7: perfect_power(7)+perfect_power(8)=27+32=59 is prime.
PROG
(PARI) lista(nn) = {vec = vector(nn, i, i); pp = select(i->((ispower(i) || (i==1))), vec); for (i=1, #pp-1, if (isprime(pp[i]+pp[i+1]), print1(i, ", ")); ); } \\ Michel Marcus, Oct 03 2013
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Oct 10 2002
STATUS
approved