Least n-digit prime using digit 7 once and rest all 1, or 0 if no such prime exists.
A090535
Least n-digit prime using digit 7 once and rest all 1, or 0 if no such prime exists.
Terms
- a(0) =7a(1) =17a(2) =0a(3) =1117a(4) =11117a(5) =0a(6) =1111711a(7) =11111117a(8) =0a(9) =1117111111a(10) =17111111111a(11) =0a(13) =0a(14) =0a(15) =0a(17) =0a(20) =0
External references
- oeis: A090535