Largest prime < the concatenation of the numbers from 1 to n (A007908).
A276200
Largest prime < the concatenation of the numbers from 1 to n (A007908).
Terms
- a(0) =11a(1) =113a(2) =1231a(3) =12343a(4) =123449a(5) =1234547a(6) =12345653a(7) =123456761a(8) =12345678899
External references
- oeis: A276200