Denominator of generalized Bernoulli number B_n^{(n-1)}.

Terms

a(0) =6a(1) =2a(2) =10a(3) =1a(4) =84a(5) =4a(6) =90a(7) =5a(8) =44a(9) =4a(10) =5460a(11) =70a(12) =360a(13) =24a(14) =102a(15) =1a(16) =1596a(17) =28a(18) =1980a(19) =66a(20) =2760a(21) =40a(22) =81900a(23) =273a(24) =1512a(25) =56a(26) =1160a(27) =20a(28) =114576a(29) =1232