83500

Appears in sequences

• Coordination sequence for 4-dimensional I-centered tetragonal orthogonal lattice.at n=25A001386
• Triangle of increasing mobiles (circular rooted trees) with n nodes and k leaves.at n=40A055356
• Number of increasing mobiles (circular rooted trees) with n nodes and 5 leaves.at n=3A055359
• a(n) = Sum_{k=1..n} binomial(n,k)*sigma(k).at n=12A185003