Convolution of A023531 and composite numbers (A002808).

Terms

a(0) =0a(1) =4a(2) =6a(3) =8a(4) =13a(5) =16a(6) =20a(7) =23a(8) =29a(9) =34a(10) =40a(11) =44a(12) =47a(13) =56a(14) =64a(15) =69a(16) =73a(17) =79a(18) =85a(19) =95a(20) =102a(21) =109a(22) =116a(23) =123a(24) =129a(25) =136a(26) =147a(27) =155a(28) =165a(29) =173