a(n) = A048673(A181815(n)).

Terms

a(0) =1a(1) =2a(2) =5a(3) =3a(4) =14a(5) =8a(6) =41a(7) =23a(8) =4a(9) =122a(10) =13a(11) =68a(12) =11a(13) =365a(14) =38a(15) =203a(16) =32a(17) =1094a(18) =113a(19) =18a(20) =608a(21) =6a(22) =63a(23) =95a(24) =3281a(25) =338a(26) =53a(27) =1823a(28) =17a(29) =188