OFFSET
1,1
LINKS
Ray Chandler, Table of n, a(n) for n = 1..10000
EXAMPLE
prime(10)*prime(11) - 1 = 29*31 - 1 = 898 = 2*449, hence 10 is a term.
PROG
(PARI) for(n=1, 1000, if(bigomega(prime(n)*prime(n+1)-1)==2, print1(n, ", ")))
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Klaus Brockhaus, Mar 29 2005
STATUS
approved