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A202382 Denominators of coefficients in Taylor series expansion of exp(cosec(x)-cotanh(x)). 5
1, 6, 72, 1296, 31104, 6531840, 235146240, 1410877440, 67722117120, 40226937569280, 16895313779097600, 4054875306983424, 291951022102806528, 569304493100472729600, 6831653917205672755200, 331072459064582602752000, 82635685782519817646899200, 800739795232617032998453248000, 190255775347269807040432491724800 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..18.

EXAMPLE

1-1/6*x+1/72*x^2+53/1296*x^3-215/31104*x^4+3341/6531840*x^5+199159/235146240*x^6+...

MAPLE

t1:=exp(csc(x)-coth(x));

t2:=series(t1, x, 30);

t3:=seriestolist(t2);

t4:=map(numer, t3); t5:=map(denom, t3); lprint(t2);

CROSSREFS

Cf. A013536.

Sequence in context: A063965 A214875 A047058 * A266869 A001763 A003235

Adjacent sequences:  A202379 A202380 A202381 * A202383 A202384 A202385

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane, Dec 18 2011

STATUS

approved

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)