81310

Appears in sequences

• a(n) = least number not of form [ (a^2/n) ] + [ (b^2)/n ].at n=34A036575
• Numbers k such that k and k^2 use only the digits 0, 1, 3, 6 and 8.at n=17A136849
• Triangle read by rows: T(n,k) is the number of labeled forests of rooted Greg hypertrees with n white vertices and weight k, 0 <= k < n.at n=17A370948