a(n) = n*denominator(n*Bernoulli(n-1)) for n >= 1 and a(0) = 0.

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =4a(5) =30a(6) =6a(7) =42a(8) =8a(9) =90a(10) =10a(11) =66a(12) =12a(13) =2730a(14) =14a(15) =30a(16) =16a(17) =510a(18) =18a(19) =798a(20) =20a(21) =2310a(22) =22a(23) =138a(24) =24a(25) =13650a(26) =26a(27) =54a(28) =28a(29) =870