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 A325744 #4 Jun 06 2019 22:00:33
%S A325744 0,1,-2,4,-8,16,-32,64,-128,256,-512,1024,-2048,4096,-8192,16384,
%T A325744 -32768,65536,-131072,262144,-524288,1048576,-2097151,4194280,
%U A325744 -8388307,16774590,-33536530,67007280,-133718550,266253060,-528213975,1042120800,-2039889435
%N A325744 First term of n-th difference sequence of (floor(Pi*k/6)), k >= 0.
%H A325744 Clark Kimberling, <a href="/A325744/b325744.txt">Table of n, a(n) for n = 1..200</a>
%t A325744 Table[First[Differences[Table[Floor[(Pi/6)*n], {n, 0, 50}], n]], {n, 1, 50}]
%Y A325744 Cf. A019673, A325664.
%K A325744 easy,sign
%O A325744 1,3
%A A325744 _Clark Kimberling_, Jun 06 2019