a(n) = A000203(A276086(n)).

Terms

a(0) =1a(1) =3a(2) =4a(3) =12a(4) =13a(5) =39a(6) =6a(7) =18a(8) =24a(9) =72a(10) =78a(11) =234a(12) =31a(13) =93a(14) =124a(15) =372a(16) =403a(17) =1209a(18) =156a(19) =468a(20) =624a(21) =1872a(22) =2028a(23) =6084a(24) =781a(25) =2343a(26) =3124a(27) =9372a(28) =10153a(29) =30459