A090473 Primes in A047783.

2, 2, 3, 5, 5, 7, 7, 7, 11, 11, 11, 13, 13, 13, 13, 17, 17, 17, 17, 19, 19, 19, 19, 23, 23, 23, 23, 29, 29, 29, 29, 29, 31, 31, 31, 31, 37, 37, 37, 37, 37, 41, 41, 41, 41, 41, 43, 43, 43, 43, 43, 47, 47, 47, 47, 47, 53, 53, 53, 53, 53, 53, 59, 59, 59, 59, 59, 59, 61, 61, 61, 61

Offset: 1

Author

Cino Hilliard, Feb 01 2004

Keywords

• easy
• nonn

Comments

The logarithmic integral can be computed in PARI: Li(x) = -eint1(log(1/x)).

Crossrefs

Cf. A047783.

Programs

PARI

lip(n) = forstep(x=1,n,1,y=floor(-eint1(log(1/x)));if(isprime(y),print1(y",")))

Extensions

Edited by David Wasserman, Nov 16 2005