Smallest semiprime ending in exactly n 7's.
A106662
Smallest semiprime ending in exactly n 7's.
Terms
- a(0) =57a(1) =77a(2) =3777a(3) =17777a(4) =277777a(5) =1777777a(6) =17777777a(7) =877777777a(8) =3777777777a(9) =17777777777a(10) =577777777777
External references
- oeis: A106662