Denominator of Sum_{p prime, p-1 divides 2*n} 1/p.

Terms

a(0) =6a(1) =30a(2) =42a(3) =30a(4) =66a(5) =2730a(6) =6a(7) =510a(8) =798a(9) =330a(10) =138a(11) =2730a(12) =6a(13) =870a(14) =14322a(15) =510a(16) =6a(17) =1919190a(18) =6a(19) =13530a(20) =1806a(21) =690a(22) =282a(23) =46410a(24) =66a(25) =1590a(26) =798a(27) =870a(28) =354a(29) =56786730