Triangle read by rows: denominator of h(n-k)*h(k)/h(n) where h(x) = zeta(2*x)*(4^x-2), 0<=k<=n.

Terms

a(0) =2a(1) =2a(2) =2a(3) =2a(4) =7a(5) =2a(6) =2a(7) =62a(8) =62a(9) =2a(10) =2a(11) =381a(12) =381a(13) =381a(14) =2a(15) =2a(16) =5110a(17) =365a(18) =365a(19) =5110a(20) =2a(21) =2a(22) =1414477a(23) =2828954a(24) =1414477a(25) =2828954a(26) =1414477a(27) =2a(28) =2a(29) =1720110