2165800

Appears in sequences

• Least octagonal (8-gonal) number that is the product of n octagonal numbers greater than 1.at n=2A225068
• a(n) = 5*binomial(8*n+5, n)/(8*n+5).at n=6A234464
• a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/7)} a(7*k) * a(n-1-7*k).at n=46A386396