Fully multiplicative with a(prime(k)) = partition(k+1).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =10a(10) =11a(11) =12a(12) =15a(13) =14a(14) =15a(15) =16a(16) =22a(17) =18a(18) =30a(19) =20a(20) =21a(21) =22a(22) =42a(23) =24a(24) =25a(25) =30a(26) =27a(27) =28a(28) =56a(29) =30