OFFSET
1,1
COMMENTS
The logarithmic integral can be computed in PARI: Li(x) = -eint1(log(1/x)).
PROG
(PARI) lip(n) = forstep(x=1, n, 1, y=floor(-eint1(log(1/x))); if(isprime(y), print1(y", ")))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Cino Hilliard, Feb 01 2004
EXTENSIONS
Edited by David Wasserman, Nov 16 2005
STATUS
approved