A162189 Numbers k such that A001223(k) < A000005(k).

10, 12, 20, 26, 28, 33, 35, 36, 40, 44, 45, 48, 49, 50, 52, 54, 56, 57, 60, 63, 64, 69, 70, 72, 75, 78, 81, 84, 88, 90, 96, 98, 100, 102, 104, 105, 108, 110, 112, 116, 117, 120, 126, 130, 132, 136, 140, 142, 144, 147, 148, 152, 153, 156, 160, 165

Offset: 1

Author

Omar E. Pol, Jul 04 2009

Keywords

• easy
• nonn

Links

• Nathaniel Johnston, Table of n, a(n) for n = 1..10000
• Omar E. Pol, Illustration: Divisors and pi(x)

Crossrefs

Cf. A000005, A001223, A068526, A161911, A161912, A161913, A162188.

Programs

Maple

p2:=2:for n from 1 to 200 do p1:=p2:p2:=ithprime(n+1):if(p2-p1Nathaniel Johnston, Apr 15 2011

Extensions

a(30)-a(56) from Nathaniel Johnston, Apr 15 2011