This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A096671 #11 Aug 11 2018 13:56:03 %S A096671 1,6,40,1008,3456,39916800,566092800,100590336000,355687428096000, %T A096671 1431118828339200,2688996956405760000,8617338912961658880000, %U A096671 224800145555521536000000,10888869450418352160768000000,8841761993739701954543616000000,4500732706172918893117440000000,280107019961673757919941754880000000 %N A096671 Denominators of terms in series expansion of sin(tan(x)), odd powers only. %e A096671 x + (1/6)*x^3 - (1/40)*x^5 - (55/1008)*x^7 - (143/3456)*x^9 + ... %Y A096671 Cf. A096664, A096712, A096716, A045688, A045689. %Y A096671 Cf. A003706. %K A096671 nonn,frac %O A096671 0,2 %A A096671 _N. J. A. Sloane_, Aug 15 2004