OFFSET
1,3
EXAMPLE
a(8)=4 because A087418(8)=5; 4*(2*3*5)+7 and 4*(2*3*5)+11 are consecutive primes.
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Oct 22 2003
EXTENSIONS
Edited by Don Reble, Nov 09 2005
STATUS
approved