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 A152519 #18 Oct 23 2024 16:33:26
%S A152519 4,6,12,16,34,38,58,62
%N A152519 Numbers k such that 2*A064413(k) = 3*k.
%C A152519 The EKG sequence A064413 has 3 critical lines.
%C A152519 Points which belong to the critical lines:
%C A152519 (1) A064413(k) = k see A152458,
%C A152519 (3/2) 2*A064413(k) = 3*k see this sequence,
%C A152519 (1/2) 2*A064413(k) = k contains only 2 numbers: {10, 14}.
%C A152519 Only 12 and 16 in this sequence are not of the form 2*prime.
%C A152519 Because points are concentrated on the plot of EKG sequence near these 3 critical lines, the number of points belonging to critical lines is surprisingly low.
%C A152519 Conjecture: Number of points on 3 critical lines of EKG sequence is finite (and complete?). - _Artur Jasinski_, Dec 08 2008
%C A152519 a(9) > 10^5, if it exists. - _Amiram Eldar_, Oct 23 2024
%Y A152519 Cf. A064413, A152458.
%K A152519 nonn,more
%O A152519 1,1
%A A152519 _Artur Jasinski_, Dec 06 2008