%I #21 Dec 25 2022 20:02:46
%S -1,-1,8,0,-1,4,0,1,0,2,0,0,0,1,0,1,0,0
%N Number of times that n appears in n-th OEIS sequence (A_n), or -1 if n appears infinitely many times.
%C Does a(19) equal -1? (See A000019.)
%H <a href="/index/Se#selfies">Index entries for sequences whose definition involves A_n (or An)</a>.
%e From _Jianing Song_, Sep 05 2018: (Start)
%e a(3) = 8 since A000003(k) = 3 for k = 11, 19, 23, 27, 31, 43, 67 and 163.
%e a(6) = 4 since A000006(k) = 6 for k = 12, 13, 14 and 15.
%e a(10) = 2 since A000010(k) = 10 for k = 11 and 22. (End)
%Y Cf. A000001, A000002, A000003, A000004, etc.
%K sign,more
%O 1,3
%A _Eric Chen_, Dec 24 2014
%E a(3) corrected by _Jianing Song_, Sep 05 2018