Smallest semiprime ending in exactly n 9's.
A106663
Smallest semiprime ending in exactly n 9's.
Terms
- a(0) =9a(1) =299a(2) =5999a(3) =19999a(4) =899999a(5) =5999999a(6) =79999999a(7) =299999999a(8) =1999999999a(9) =49999999999a(10) =499999999999
External references
- oeis: A106663