Dirichlet convolution of primes (A000040) with themselves.

Terms

a(0) =4a(1) =12a(2) =20a(3) =37a(4) =44a(5) =82a(6) =68a(7) =118a(8) =117a(9) =182a(10) =124a(11) =296a(12) =164a(13) =274a(14) =298a(15) =375a(16) =236a(17) =512a(18) =268a(19) =612a(20) =462a(21) =502a(22) =332a(23) =950a(24) =509a(25) =650a(26) =642a(27) =924a(28) =436a(29) =1310