A012863 Numerators of coefficients in Taylor series expansion of log(cotan(x)*log(x+1)).

0, -1, -1, -1, 3, -19, 59, -751, 174989, -2857, 2249927, -434293, 32401403009, -8181904909, 1150205658377, -5044289, 64371087485333, -5026792806787, 3500507461200889, -69028763155644023, 67179942704167004419, -1022779523247467, 348074852007121792219, -750218743980105669781, 129827894444079903690116761

Offset

0,5

Links

Table of n, a(n) for n=0..24.

Example

-1/2*x-1/8*x^2-1/8*x^3+3/320*x^4-19/288*x^5+59/1920*x^6-751/17280*x^7+...

Mathematica

Numerator[CoefficientList[Series[Log[Cot[x]Log[x+1]], {x, 0, 30}], x]] (* Harvey P. Dale, Nov 04 2012 *)

Crossrefs

Cf. A202619.

Sequence in context: A106875 A215646 A182353 * A269156 A370434 A041015

Adjacent sequences: A012860 A012861 A012862 * A012864 A012865 A012866

Keyword

sign,frac

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Extensions

Corrected by N. J. A. Sloane, Dec 21 2011

Status

approved