590520

Appears in sequences

• Octagonal numbers for which the sum of the digits is also an octagonal number.at n=33A117082
• Octagonal numbers for which both the sum and the product of the digits is also an octagonal number.at n=20A117084
• a(n) = smallest possible (product of b(k)'s + product of c(k)'s), where the positive integers <= n are partitioned somehow into {b(k)} and {c(k)}.at n=14A127180
• a(n) = n*(n+1)*(n+2)*(n+3)/3.at n=35A162668
• a(n) = 6*(n - 1)*(81*n - 104) for n >= 1.at n=35A304837