A096671 Denominators of terms in series expansion of sin(tan(x)), odd powers only.

1, 6, 40, 1008, 3456, 39916800, 566092800, 100590336000, 355687428096000, 1431118828339200, 2688996956405760000, 8617338912961658880000, 224800145555521536000000, 10888869450418352160768000000, 8841761993739701954543616000000, 4500732706172918893117440000000, 280107019961673757919941754880000000

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Example

x + (1/6)*x^3 - (1/40)*x^5 - (55/1008)*x^7 - (143/3456)*x^9 + ...

Crossrefs

Cf. A096664, A096712, A096716, A045688, A045689.

Cf. A003706.

Sequence in context: A186196 A196478 A001367 * A196712 A086803 A136382

Adjacent sequences: A096668 A096669 A096670 * A096672 A096673 A096674

Keyword

nonn,frac

Author

N. J. A. Sloane, Aug 15 2004

Status

approved