Denominator of B(4n+2)/(8n+4) where B(m) are the Bernoulli numbers.

Terms

a(0) =504a(1) =264a(2) =24a(3) =28728a(4) =552a(5) =24a(6) =171864a(7) =24a(8) =24a(9) =151704a(10) =1128a(11) =264a(12) =86184a(13) =1416a(14) =24a(15) =776664a(16) =18744a(17) =24a(18) =39816a(19) =1992a(20) =24a(21) =9796248a(22) =24a(23) =24a(24) =51912a(25) =2568a(26) =66792a(27) =504a(28) =24a(29) =24