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A012868 Numerators of coefficients in Taylor series expansion of log(cotan(x)*arcsinh(x)). 1
0, -1, -1, -1, 347, -1531, 590267, -37723537, 1103996977, -2158074791, 328785573754709, -134852375996381, 3427455470023873621, -13844935285148389217, 6142449451071240707, -43761094586606903148089, 37938502177281712935274975819, -110450564689571423030247983611, 4389621268440117526955711378765711 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
EXAMPLE
-1/2*x^2-1/60*x^4-1/18*x^6+347/22680*x^8-1531/85050*x^10+590267/52123500*x^12+...
CROSSREFS
Cf. A202622.
Sequence in context: A343701 A142369 A190814 * A343303 A226669 A226665
KEYWORD
sign,frac
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Corrected by N. J. A. Sloane, Dec 21 2011
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)