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A158599 Numerators of x^(2n-1) in the series expansion of Steinhaus's approximate angle trisection. 1
1, 1, 1, 7, 443, 1291, 547, -14525053, -2152141, -1619851403, -1536016974551, -477931750239611, -3034967131152703, -422006960276038428191, 2494365752617228421, 1154806795095971456827, 49828124197505806707965147 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
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. A158600.
Sequence in context: A331338 A269555 A027876 * A009660 A024097 A203060
KEYWORD
sign,frac
AUTHOR
Eric W. Weisstein, Mar 22 2009
STATUS
approved

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Last modified April 19 07:38 EDT 2024. Contains 371782 sequences. (Running on oeis4.)