OFFSET
2,1
COMMENTS
Largest known term is 446185740 (see b-file). No more terms < 10^9.
LINKS
Donovan Johnson, Table of n, a(n) for n=2..20150
EXAMPLE
68 is in this sequence because no 6-almost prime and a prime sum to 68. 69 is not in this sequence because the sum of 64 (6-almost prime) and 5 (prime) is 69.
MATHEMATICA
Complement[Range[1000], Union@Flatten@Outer[Plus, Select[Range[1000], PrimeOmega[#] == 6 &], Prime[Range[PrimePi[1000]]]]] (* Robert Price, Jun 16 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Donovan Johnson, Nov 05 2008
STATUS
approved