a(n) = A332215(A335882(n)).

Terms

a(0) =15a(1) =5a(2) =30a(3) =63a(4) =255a(5) =10a(6) =60a(7) =13a(8) =126a(9) =2047a(10) =510a(11) =20a(12) =120a(13) =26a(14) =252a(15) =4094a(16) =262143a(17) =11a(18) =1020a(19) =4194303a(20) =40a(21) =240a(22) =52a(23) =504a(24) =8188a(25) =61a(26) =524286a(27) =22a(28) =2040a(29) =8388606