17534158031domain: NAppears in sequencesNumerators of Taylor series expansion of arcsin(x). Also arises from arccos(x), arccsc(x), arcsec(x), arcsinh(x).at n=22A055786Numerators of coefficient of x^(n+1/2) in the series expansion of the haversine.at n=22A143581Denominators of the BG1[ -5,n] coefficients of the BG1 matrix.at n=22A162444