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 A144264 #14 Feb 23 2020 07:11:37
%S A144264 1,2,12,18,20,21,29,36,59,66,71,73,88,90,94,95,103,104,109,128,130,
%T A144264 131,161,166,170,209,234,250,292,299,307,318,332,353,362,375,377,391,
%U A144264 481,509,556,557,564,577,602,619,630,665,670,684,698,728,792,808,840
%N A144264 Numbers k such that A014085(k) = A014085(k+1).
%C A144264 Numbers k such that number of primes between k^2 and (k+1)^2 is equal to number of primes between (k+1)^2 and (k+2)^2.
%C A144264 Conjecture: the sequence is infinite.
%H A144264 Zak Seidov and Amiram Eldar, <a href="/A144264/b144264.txt">Table of n, a(n) for n = 1..3000</a> (terms 1..2000 from Zak Seidov)
%t A144264 Flatten[Position[Partition[PrimePi[Range[1000]^2],3,1],_?(Length[Union[ Differences[#]]]==1&),{1},Heads->False]] (* _Harvey P. Dale_, Jun 17 2014 *)
%Y A144264 Cf. A014085, A144359.
%K A144264 nonn
%O A144264 1,2
%A A144264 _Zak Seidov_, Sep 16 2008, Sep 17 2008