When A032523 is a maximum; or, A091657 less duplicates.

Terms

a(0) =4a(1) =9a(2) =30a(3) =40a(4) =44a(5) =130a(6) =276a(7) =647a(8) =791a(9) =878a(10) =1008a(11) =3041a(12) =3200a(13) =3384a(14) =5606a(15) =9721a(16) =17899a(17) =22640a(18) =34070a(19) =34152a(20) =37648a(21) =91193a(22) =134943a(23) =152617a(24) =158172a(25) =190950a(26) =258992a(27) =315679a(28) =525765a(29) =558041