Denominator of the coefficient [x^1] of the Bernoulli twin number polynomial C(n,x).

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =6a(5) =6a(6) =6a(7) =6a(8) =10a(9) =10a(10) =6a(11) =6a(12) =210a(13) =210a(14) =2a(15) =2a(16) =30a(17) =30a(18) =42a(19) =42a(20) =110a(21) =110a(22) =6a(23) =6a(24) =546a(25) =546a(26) =2a(27) =2a(28) =30a(29) =30