|
%I #7 Apr 10 2019 22:32:04
%S 0,0,1,1,1,1,3,3,3,2,3,3,3,2,5,3,4,4,3,4,3,5,4,7,6,6,7,6,7,5,4,7,7,9,
%T 9,8,5,5,8,7,11,9,7,6,7,8,10,9,10,10,9,11,11,13,10,11,9,13,9,11,10,10,
%U 12,9,12,12,13,11,13,16,15,19,11,11,13,13,17,9,19,12,14,12,15,16,15,18,13,17,16,12,15,15,12,16,17
%N Number of primes q < prime(n), such that 4*prime(n) + q is prime.
%C Conjecture: a(n) > 0 for all n >= 3. - _Dmitry Kamenetsky_, Mar 18 2019
%Y Cf. A306995, A306997.
%K nonn
%O 1,7
%A _Dmitry Kamenetsky_, Mar 18 2019
|
