OFFSET
1,2
COMMENTS
Numbers n such that A071558(n) > n.
PROG
(PARI) is(n)=for(k=1, n-1, if(isprime(n*k-1)&&isprime(n*k+1), return(0))); 1 \\ Charles R Greathouse IV, May 08 2015
(PARI) is(n)=my(s=6/gcd(n, 6)); forstep(k=s, n-1, s, if(isprime(n*k-1)&&isprime(n*k+1), return(0))); 1 \\ Charles R Greathouse IV, May 08 2015
CROSSREFS
KEYWORD
nonn,fini
AUTHOR
Juri-Stepan Gerasimov, May 07 2015
STATUS
approved