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 A019323 #15 Feb 26 2024 09:16:50
%S A019323 5,4,6,31,26,781,21,19531,626,15751,521,12207031,601,305175781,13021,
%T A019323 315121,390626,190734863281,15501,4768371582031,375601,196890121,
%U A019323 8138021,2980232238769531,390001,95397958987501
%N A019323 Cyclotomic polynomials at x=5.
%H A019323 Paolo Xausa, <a href="/A019323/b019323.txt">Table of n, a(n) for n = 0..1000</a>
%H A019323 <a href="/index/Cy#CyclotomicPolynomialsValuesAtX">Index entries for cyclotomic polynomials, values at X</a>
%p A019323 with(numtheory,cyclotomic); f := n->subs(x=5,cyclotomic(n,x)); seq(f(i),i=0..64);
%t A019323 Join[{5}, Cyclotomic[Range[50], 5]] (* _Paolo Xausa_, Feb 26 2024 *)
%K A019323 nonn
%O A019323 0,1
%A A019323 _Simon Plouffe_