Denominators of e.g.f.: tan(arccosh(x)) = cot(arcsinh(x)).

Terms

a(0) =6a(1) =12a(2) =126a(3) =72a(4) =22a(5) =252a(6) =126a(7) =144a(8) =7182a(9) =2772a(10) =4554a(11) =1512a(12) =378a(13) =84a(14) =14322a(15) =2464a(16) =42a(17) =14364a(18) =342a(19) =792a(20) =1251558a(21) =191268a(22) =136206a(23) =21168a(24) =594a(25) =1188a(26) =33858a(27) =1368a(28) =1062a(29) =257796