Denominators of higher order Bernoulli numbers.

Terms

a(0) =2a(1) =4a(2) =12a(3) =24a(4) =20a(5) =24a(6) =840a(7) =16a(8) =180a(9) =840a(10) =440a(11) =720a(12) =6552a(13) =112a(14) =240a(15) =7392a(16) =2380a(17) =72a(18) =207480a(19) =560a(20) =27720a(21) =55440a(22) =2576a(23) =10080a(24) =397800a(25) =2288a(26) =23760a(27) =12768a(28) =2320a(29) =1440