Denominator of 1 - Sum_{i=1..n} |Bernoulli(i)|.

Terms

a(0) =1a(1) =2a(2) =3a(3) =3a(4) =10a(5) =10a(6) =105a(7) =105a(8) =70a(9) =70a(10) =1155a(11) =1155a(12) =1430a(13) =1430a(14) =2145a(15) =2145a(16) =24310a(17) =24310a(18) =4849845a(19) =4849845a(20) =58786a(21) =58786a(22) =2028117a(23) =2028117a(24) =965770a(25) =965770a(26) =1448655a(27) =1448655a(28) =28007330a(29) =28007330