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 A063703 #15 Feb 27 2024 07:27:45 %S A063703 1,0,2,5,3,16,2,45,7,23,4,320,5,841,11,25,47,5776,14,15125,34,166,76, %T A063703 103680,41,16626,199,5855,233,1860496,56,4870845,2207,7601,1364,45080, %U A063703 305,87403801,3571,51940,1926,599074576,407,1568397605,10946,80320 %N A063703 Cyclotomic polynomials Phi_n at x=phi, floored down (where phi = tau = (sqrt(5)+1)/2). %H A063703 Paolo Xausa, <a href="/A063703/b063703.txt">Table of n, a(n) for n = 0..1000</a> %H A063703 <a href="/index/Cy#CyclotomicPolynomialsValuesAtPhi">Index entries for cyclotomic polynomials, values at phi</a> %p A063703 with(numtheory); Phi_at_x := (n,y) -> subs(x=y,cyclotomic(n,x)); [seq(floor(evalf(simplify(Phi_at_x(j,(sqrt(5)+1)/2)))),j=0..120)]; %t A063703 Floor[Simplify[Cyclotomic[Range[0, 50],GoldenRatio]]] (* _Paolo Xausa_, Feb 27 2024 *) %Y A063703 Cf. A019320, A063705, A063707, A063704. %K A063703 nonn %O A063703 0,3 %A A063703 _Antti Karttunen_, Aug 03 2001 %E A063703 a(43) corrected by _Sean A. Irvine_, May 08 2023