731136

Appears in sequences

• Wiener number of n-hexagonal triangle.at n=16A033544
• a(n) = C(n+5, 5)*(n+3)*(-1)^(n+1)*16/3.at n=13A138331
• E.g.f.: S(x,q) = Integral C(x,q) * C(q*x,q) dx, such that C(x,q)^2 - S(x,q)^2 = 1, where S(x,q) = Sum_{n>=0} sum_{k=0..n*(n+1)/2} T(n,k)*x^n*y^k/n!, as an irregular triangle of coefficients T(n,k) read by rows.at n=54A322219
• Numbers whose prime factors and prime signature have the same mean.at n=22A359904