a(0) = 1, a(n) = (denominator of the Bernoulli number B_{2n})/3, for n>=1.

Terms

a(0) =1a(1) =2a(2) =10a(3) =14a(4) =10a(5) =22a(6) =910a(7) =2a(8) =170a(9) =266a(10) =110a(11) =46a(12) =910a(13) =2a(14) =290a(15) =4774a(16) =170a(17) =2a(18) =639730a(19) =2a(20) =4510a(21) =602a(22) =230a(23) =94a(24) =15470a(25) =22a(26) =530a(27) =266a(28) =290a(29) =118