OFFSET
1,1
EXAMPLE
d(300)-300-1 = -283, absolute value of which is prime.
PROG
(PARI) j=[]; for(n=1, 300, if(isprime(numdiv(n)-n-1), j=concat(j, n))); j
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jason Earls, Jul 23 2001
STATUS
approved