%I #6 Apr 10 2020 06:18:49

%S 1,9,2,6,5,7,4,12,11,8,10,17,3,16,14,13,15,19,18,20,21,22,24,23,27,26,

%T 28,25,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,

%U 50,51,52,53,54,55,56,57,58,59,60,61

%N Indices of primes occurring in A107801.

%H Jinyuan Wang, <a href="/A107821/b107821.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = pi(A107801(n)).

%Y Cf. A107801 - A107814, A107822, A107823, A107824, A107825, A107826, A107827, A107828, A107829, A107830, A107831, A107832, A107833, A107834.

%K nonn,easy

%O 1,2

%A _Zak Seidov_, May 24 2005