1533776805
domain: N
Appears in sequences
- Numbers that are both triangular and pentagonal.at n=5A014979
- Hexagonal pentagonal numbers.at n=2A046180
- Numbers that are n-gons for three or more n's, where n=3,4,5,...,16.at n=26A062712
- Triangular numbers that are one-third of another triangular number: T(m) such that 3*T(m) = T(k) for some k.at n=9A076139