Square array T(i,j) = Bernoulli(2i)*Bernoulli(2j) read by antidiagonals: denominators.

Terms

a(0) =1a(1) =6a(2) =6a(3) =30a(4) =36a(5) =30a(6) =42a(7) =180a(8) =180a(9) =42a(10) =30a(11) =252a(12) =900a(13) =252a(14) =30a(15) =66a(16) =180a(17) =1260a(18) =1260a(19) =180a(20) =66a(21) =2730a(22) =396a(23) =900a(24) =1764a(25) =900a(26) =396a(27) =2730a(28) =6a(29) =16380