336073

Appears in sequences

• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+263)^2 = y^2.at n=13A207058
• a(n) = Sum_{k=0..floor(n/2)} binomial(k+2,2) * binomial(n,k) * binomial(n-k,k).at n=11A392032