Number of odd primes p < 10^n such that p+2 = product of 2 primes (no twin Chen primes).
A111067
Number of odd primes p < 10^n such that p+2 = product of 2 primes (no twin Chen primes).
Terms
- a(0) =1a(1) =11a(2) =79a(3) =427a(4) =3009a(5) =21779a(6) =166649a(7) =1322266a(8) =10752066a(9) =89305602a(10) =754868608a(11) =6472917998
External references
- oeis: A111067