3220562556
domain: N
Appears in sequences
- Indices of A052343 (ways to write n as sum of two triangular numbers) where record values are reached.at n=21A052348
- Indices of A052344 (ways to write n as sum of two nonzero triangular numbers) where record values are reached.at n=21A053587
- a(n) is the smallest number which can be represented as the sum of two distinct nonzero hexagonal numbers in exactly n ways, or -1 if no such number exists.at n=22A374141