Convolution of primes with themselves.

Terms

a(0) =4a(1) =12a(2) =29a(3) =58a(4) =111a(5) =188a(6) =305a(7) =462a(8) =679a(9) =968a(10) =1337a(11) =1806a(12) =2391a(13) =3104a(14) =3953a(15) =4978a(16) =6175a(17) =7568a(18) =9185a(19) =11030a(20) =13143a(21) =15516a(22) =18177a(23) =21150a(24) =24471a(25) =28152a(26) =32197a(27) =36678a(28) =41543a(29) =46828