81567

Appears in sequences

• Partial sum of A005915.at n=17A126274
• a(n) = 16*n^3 + 10*n^2 + 4*n + 1.at n=17A272130
• a(n) = Sum_{k=0..floor(2*n/7)} binomial(2*k+1,2*n-7*k).at n=37A392456