513764

Appears in sequences

• Fixed points of A065649, a permutation of nonnegative integers based on Champernowne's constant.at n=18A261279
• Wiener index of the n X n antelope graph.at n=13A292039
• a(n) = (2/n)*Sum_{k=1..n} (2k+1)*M(k)^2 where M(k) is the Motzkin number A001006(k).at n=7A295132