Number of primes of the form b^2 + 1 for b <= 10^n.
A206709
Number of primes of the form b^2 + 1 for b <= 10^n.
Terms
- a(0) =1a(1) =5a(2) =19a(3) =112a(4) =841a(5) =6656a(6) =54110a(7) =456362a(8) =3954181a(9) =34900213a(10) =312357934a(11) =2826683630a(12) =25814570672a(13) =237542444180
External references
- oeis: A206709