a(n) is the first number that is a prime times 3^n and ends in exactly n 1's.
A376689
a(n) is the first number that is a prime times 3^n and ends in exactly n 1's.
Terms
- a(0) =2a(1) =21a(2) =711a(3) =240111a(4) =51111a(5) =45411111a(6) =16059111111a(7) =43761111111
External references
- oeis: A376689