650781

Appears in sequences

• Number of homeomorphically irreducible general graphs on 3 labeled node and with n edges.at n=35A060578
• Number of strings of numbers x(i=1..7) in 0..n with sum i^2*x(i)^2 equal to n^2*49.at n=30A184245
• a(n) = (3!)^3 * [z^3] hypergeom([], [1,1], z)^n.at n=27A287702