This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A340203 #14 Jul 27 2024 23:16:08
%S A340203 0,0,0,1,1,2,3,4,4,4,5,6,6,7,8,8,9,10,10,10,11,12,13,13,13,14,15,15,
%T A340203 16,17,17,17,17,17,18,19,20,20,20,21,21,21,22,22,23,24,24,24,25,26,26,
%U A340203 26,27,27,28,28,28,29,30,30,30,31,32,32,33,33,33,33,34,35,35,35,35
%N A340203 Number of primes in A339399 among the values of A339399(k) for k = 1..n.
%H A340203 <a href="/index/Par#part">Index entries for sequences related to partitions</a>
%F A340203 a(n) = Sum_{k=1..n} pi(c(k)) - pi(c(k)-1), where c = A339399.
%e A340203 a(14) = 7; There are 7 primes that are less than or equal to A339399(n). For example, the first 14 values of A339399(n) are 1, 1, 1, 2, 1, 3, 2, 2, 1, 4, 2, 3, 1 and 5 (7 of which are prime).
%Y A340203 Cf. A000720, A339399, A340205.
%K A340203 nonn
%O A340203 1,6
%A A340203 _Wesley Ivan Hurt_, Dec 31 2020