A158600 Denominators of x^(2n-1) in the series expansion of Steinhaus's approximate angle trisection.

3, 648, 31104, 11197440, 40633270272, 8126654054400, 367789143490560, 1265121095778828288000, 1943226003116280250368, 42473368353827268329472000, 1552949905905681518542454784000

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Eric Weisstein's World of Mathematics, Angle Trisection

Example

x/3 + x^3/648 + x^5/31104 + (7*x^7)/11197440 + (443*x^9)/40633270272 + ...

Crossrefs

Cf. A158599.

Sequence in context: A091261 A332163 A230808 * A092301 A229668 A165343

Adjacent sequences: A158597 A158598 A158599 * A158601 A158602 A158603

Keyword

nonn,frac

Author

Eric W. Weisstein, Mar 22 2009

Status

approved