Number of pairs of primes p < q such that (p+q)/2 = A002110(n), the n-th primorial.
A147517
Number of pairs of primes p < q such that (p+q)/2 = A002110(n), the n-th primorial.
Terms
- a(0) =0a(1) =1a(2) =6a(3) =30a(4) =190a(5) =1564a(6) =17075a(7) =226758a(8) =3792532a(9) =82116003a(10) =1975662890
External references
- oeis: A147517