a(n) = denominator(n!/phi(n!)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =4a(6) =8a(7) =8a(8) =8a(9) =8a(10) =16a(11) =16a(12) =192a(13) =192a(14) =192a(15) =192a(16) =3072a(17) =3072a(18) =55296a(19) =55296a(20) =55296a(21) =55296a(22) =110592a(23) =110592a(24) =110592a(25) =110592a(26) =110592a(27) =110592a(28) =442368a(29) =442368