Dirichlet convolution of primes (with 1) with themselves.

Terms

a(0) =1a(1) =4a(2) =6a(3) =14a(4) =14a(5) =34a(6) =26a(7) =54a(8) =47a(9) =74a(10) =58a(11) =136a(12) =74a(13) =134a(14) =128a(15) =187a(16) =106a(17) =260a(18) =122a(19) =296a(20) =220a(21) =262a(22) =158a(23) =502a(24) =227a(25) =342a(26) =316a(27) =500a(28) =214a(29) =682