%N Integers which are not the sum of a 6-almost prime and a prime.
%C Largest known term is 446185740 (see b-file). No more terms < 10^9.
%H Donovan Johnson, <a href="/A146297/b146297.txt">Table of n, a(n) for n=2..20150</a>
%e 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.
%t Complement[Range, Union@Flatten@Outer[Plus, Select[Range, PrimeOmega[#] == 6 &], Prime[Range[PrimePi]]]] (* _Robert Price_, Jun 16 2019 *)
%Y Cf. A000040, A046306, A130588, A146295, A146296.
%A _Donovan Johnson_, Nov 05 2008