2831155200domain: NAppears in sequencesDenominators in the Taylor expansion exp(cosec(x)-cot(x))=1 + x/2 + x^2/8 + x^3/16 + 3*x^4/128 + 37*x^5/3840 + 59*x^6/15360 + ...at n=12A013516Denominators of the coefficients in a series for the angles in the Spiral of Theodorus.at n=13A351862