208152

Appears in sequences

• Numbers k such that sigma(k) - usigma(k) is a square and sets a new record for such squares.at n=36A063840
• First differences of A047835.at n=6A133708
• Number of binary operators defined on the finite chain L_n={0,1,...n}, C:L_n^2-> L_n, which are increasing in each argument, and satisfy the boundary conditions C(0,n)=C(n,0)=0 and C(n,n)=n.at n=3A360612