Convolution of sequence of primes with sequence sigma(n).

Terms

a(0) =2a(1) =9a(2) =22a(3) =48a(4) =85a(5) =151a(6) =231a(7) =355a(8) =500a(9) =709a(10) =937a(11) =1267a(12) =1617a(13) =2069a(14) =2575a(15) =3193a(16) =3860a(17) =4686a(18) =5549a(19) =6593a(20) =7725a(21) =8985a(22) =10337a(23) =11961a(24) =13591a(25) =15464a(26) =17498a(27) =19714a(28) =22036a(29) =24690