-1576

Appears in sequences

• Expansion of cosh(tan(x))/exp(x).at n=7A009161
• Expansion of sin(x)*cos(tanh(x)).at n=3A009536
• Expansion of e.g.f. sin(x)/cosh(sin(x)) (odd powers only).at n=3A009558
• McKay-Thompson series of class 15B for Monster.at n=38A058509
• McKay-Thompson series of class 24f for the Monster group with a(0) = -2.at n=38A093067
• Matrix inverse of triangle A099602, read by rows, where row n of A099602 equals the inverse binomial transform of column n of the triangle of trinomial coefficients (A027907).at n=49A104495
• Triangle of coefficients of characteristic polynomials of anti-symmetrical tridiagonal matrices: Middle diagonal: a=1; Lower first subdiagonal: b=2; Upper first subdiagonal: c=-2; Example: M(3) {{1, -2, 0}, {2, 1, -2}, {0, 2, 1}}.at n=39A136643