a(1) = 11 then the least number of concatenation of n that gives prime when placed on the most significant side of the previous concatenation.
A110767
a(1) = 11 then the least number of concatenation of n that gives prime when placed on the most significant side of the previous concatenation.
Terms
- a(0) =11a(1) =2a(2) =33a(3) =444a(4) =55a(5) =6a(6) =777777777777
External references
- oeis: A110767