A202382 Denominators of coefficients in Taylor series expansion of exp(cosec(x)-cotanh(x)).

1, 6, 72, 1296, 31104, 6531840, 235146240, 1410877440, 67722117120, 40226937569280, 16895313779097600, 4054875306983424, 291951022102806528, 569304493100472729600, 6831653917205672755200, 331072459064582602752000, 82635685782519817646899200, 800739795232617032998453248000, 190255775347269807040432491724800

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: A362722 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