51280

Appears in sequences

• Numerators of e.g.f. sec(arccosh(x)) = cosec(arcsinh(x)).at n=4A102073
• Numbers such that the largest prime factor equals the sum of the 4th power of the other prime factors.at n=24A244344
• "Erase or triple": list of the successive integers that produce the next "altitude" record (see the comments section).at n=17A300150
• G.f. A(x) satisfies: 1 = Sum_{n>=0} ( (1 + x*A(x)^2)^n - A(x) )^n.at n=6A303927