Primes formed by concatenating n, n, n, n, and 1 for n = 1, 2, 3,....
A210720
Primes formed by concatenating n, n, n, n, and 1 for n = 1, 2, 3,....
Terms
- a(0) =33331a(1) =99991a(2) =242424241a(3) =404040401a(4) =454545451a(5) =464646461a(6) =494949491a(7) =525252521a(8) =575757571a(9) =737373731a(10) =787878781a(11) =949494941
External references
- oeis: A210720