OFFSET
1,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
FORMULA
EXAMPLE
Prime(6) = 13 and prime(7) = 17. 13 + 17 = 30 = 2 * 3 * 5, which has three distinct prime factors, hence a(6) = 3.
MATHEMATICA
Table[PrimeNu[Prime[n] + Prime[n + 1]], {n, 105}] (* Jean-François Alcover, Oct 21 2013 *)
PROG
(PARI) A071215(n)=omega(prime(n)+prime(n+1)) \\ M. F. Hasler, Jul 23 2007
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Labos Elemer, May 17 2002
STATUS
approved