1189440

Appears in sequences

• Expansion of e.g.f. cos(arcsinh(x)*arctan(x)) (only even powers).at n=5A012627
• Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x) defined below in Comments.at n=20A192422
• Numbers m such that the equation m = k*sigma(k) has more than one solution.at n=26A337873
• Triangle read by rows of partial Bell polynomials B_{n,k} (x_1,...,x_{n-k+1}) evaluated at 2, 2, 12, 72, ..., (n-k)(n-k+1)!, n>=1, 1<=k<=n.at n=29A353131