OFFSET
1,1
COMMENTS
EXAMPLE
a(1) = 97 = 96 + 1 = 1 + (8 * 12) = 1 + A014612(1)*A014612(2) = 1 more than the product of the first 2 of the 3-almost primes and is prime.
a(2) = 32920473601 = 1 + (8 * 12 * 18 * 20 * 27 * 28 * 30 * 42) = 1 more than the product of the first 8 of the 3-almost primes and is prime.
a(3) = 1 more than the product of the first 9 of the 3-almost primes and is prime.
a(4) = 1 more than the product of the first 10 of the 3-almost primes and is prime.
a(5) = 1 more than the product of the first 19 of the 3-almost primes and is prime.
MATHEMATICA
Select[Rest[FoldList[Times, 1, Select[Range[250], PrimeOmega[#]==3&]]]+1, PrimeQ] (* Harvey P. Dale, Dec 21 2013 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Feb 13 2006
EXTENSIONS
One more term (a(6)) from Harvey P. Dale, Dec 21 2013
STATUS
approved