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 A152898 #17 Dec 14 2023 05:15:06
%S A152898 1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,
%T A152898 0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,
%U A152898 0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0,1,4,0,0,0
%N A152898 Periodic sequence [1,4,0,0,0] of period 5.
%H A152898 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,1).
%F A152898 a(n+5) = a(n) with a(0) = 1, a(1) = 4 and a(2) = a(3) = a(4) = 0.
%F A152898 G.f.: (1+4*z)/(1-z^5).
%t A152898 PadRight[{},110,{1,4,0,0,0}] (* _Harvey P. Dale_, Jan 21 2012 *)
%Y A152898 Cf. A026065.
%K A152898 easy,nonn
%O A152898 0,2
%A A152898 _Richard Choulet_, Dec 14 2008