OFFSET
2,1
COMMENTS
Largest term is 60060 (see b-file). No more terms < 10^8. Conjectured to be complete.
LINKS
Donovan Johnson, Table of n, a(n) for n=2..196
EXAMPLE
20 is in this sequence because no 4-almost prime and a prime sum to 20. 21 is not in this sequence because the sum of 16 (4-almost prime) and 5 (prime) is 21.
MATHEMATICA
Complement[Range[1000], Union@Flatten@Outer[Plus, Select[Range[1000], PrimeOmega[#] == 4 &], Prime[Range[PrimePi[1000]]]]] (* Robert Price, Jun 16 2019 *)
CROSSREFS
KEYWORD
fini,nonn
AUTHOR
Donovan Johnson, Nov 05 2008
STATUS
approved