188049

Appears in sequences

• Expansion of e.g.f. sec(tan(sin(x))), even powers only.at n=5A012148
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} (-k)^j * binomial(n,j)^3.at n=61A336179