Indices of pentagonal numbers that are one-fifth of another one.
A385616
Indices of pentagonal numbers that are one-fifth of another one.
Terms
- a(0) =0a(1) =1a(2) =39a(3) =85705a(4) =4026303a(5) =8886048529a(6) =417455130327
External references
- oeis: A385616