a(1) = 1, and for n > 1, a(n) = A276085(A327963(n)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =4a(4) =0a(5) =6a(6) =0a(7) =8a(8) =3a(9) =30a(10) =0a(11) =12a(12) =0a(13) =4a(14) =15a(15) =16a(16) =0a(17) =32a(18) =0a(19) =20a(20) =7a(21) =2310a(22) =0a(23) =24a(24) =7a(25) =8a(26) =27a(27) =28a(28) =0a(29) =6469693230