OFFSET
1,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[ Range[600], !PrimeQ[ # ] && GCD[ #, Prime[ # ]^2 - 1] == 1 & ]
PROG
(PARI) { n=0; for (m=1, 10^9, if (isprime(m), next); if (gcd(m, prime(m)^2 - 1) == 1, write("b064937.txt", n++, " ", m); if (n==1000, return)) ) } \\ Harry J. Smith, Sep 30 2009
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Robert G. Wilson v, Oct 26 2001
STATUS
approved