103385domain: NAppears in sequencesStirling numbers of the first kind: s(n+2, n).at n=29A000914Numerator of Euler(n, 5/28).at n=4A157233Ordered Stirling numbers S1(n,k) >= 0.at n=39A193245E.g.f.: 1 / ((sec(x) + tan(x)) * (1 - x)).at n=9A337445