Convolution of the prime numbers with phi(n) convoluted with sigma(n).

Terms

a(0) =0a(1) =0a(2) =2a(3) =11a(4) =35a(5) =92a(6) =203a(7) =416a(8) =766a(9) =1356a(10) =2235a(11) =3593a(12) =5472a(13) =8224a(14) =11858a(15) =16918a(16) =23364a(17) =32036a(18) =42723a(19) =56708a(20) =73611a(21) =95090a(22) =120642a(23) =152506a(24) =189674a(25) =235332a(26) =288044a(27) =351423a(28) =424108a(29) =510596