Number of primes p < 10^n such that 4*p+1 is also prime.
A182265
Number of primes p < 10^n such that 4*p+1 is also prime.
Terms
- a(0) =2a(1) =9a(2) =31a(3) =176a(4) =1057a(5) =7422a(6) =53709a(7) =407198a(8) =3198946a(9) =25773602a(10) =212205881a(11) =1777532673
External references
- oeis: A182265