Smallest n-digit prime with digits from {1,4,7} only, or 0 if no such prime exists.
A091920
Smallest n-digit prime with digits from {1,4,7} only, or 0 if no such prime exists.
Terms
- a(0) =7a(1) =11a(2) =0a(3) =1117a(4) =11117a(5) =0a(6) =1111447a(7) =11111117a(8) =0a(9) =1111111411a(10) =11111111741a(11) =0a(14) =0a(17) =0a(20) =0
External references
- oeis: A091920