982651

Appears in sequences

• Frobenius number of the numerical semigroup generated by three consecutive pyramidal numbers.at n=21A069762
• Start with a single hexagon; at n-th generation add a hexagon at each expandable vertex (this is the "vertex to side" version); a(n) is the sum of all label values at n-th generation. (See comment for construction rules.)at n=29A247905