The denominators of Zagier's modification of the Bernoulli numbers.

Terms

a(0) =4a(1) =24a(2) =4a(3) =80a(4) =4a(5) =1260a(6) =4a(7) =1120a(8) =4a(9) =264a(10) =4a(11) =12012a(12) =4a(13) =312a(14) =4a(15) =38080a(16) =4a(17) =1220940a(18) =4a(19) =83600a(20) =4a(21) =552a(22) =4a(23) =78936a(24) =4a(25) =24a(26) =4a(27) =30160a(28) =4a(29) =62300700