a(n) = denominator(Bernoulli(prime(n) - 1)).

Terms

a(0) =2a(1) =6a(2) =30a(3) =42a(4) =66a(5) =2730a(6) =510a(7) =798a(8) =138a(9) =870a(10) =14322a(11) =1919190a(12) =13530a(13) =1806a(14) =282a(15) =1590a(16) =354a(17) =56786730a(18) =64722a(19) =4686a(20) =140100870a(21) =3318a(22) =498a(23) =61410a(24) =4501770a(25) =33330a(26) =4326a(27) =642a(28) =209191710a(29) =1671270