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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =1a(7) =49a(8) =49a(9) =1a(10) =1a(11) =310a(12) =343a(13) =310a(14) =1a(15) =1a(16) =4191a(17) =341a(18) =341a(19) =4191a(20) =1a(21) =1a(22) =1162525a(23) =2669667a(24) =1374230a(25) =2669667a(26) =1162525a(27) =1a(28) =1a(29) =1414477