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 A019326 #23 Feb 26 2024 09:14:33 %S A019326 8,7,9,73,65,4681,57,299593,4097,262657,3641,1227133513,4033, %T A019326 78536544841,233017,14709241,16777217,321685687669321,261633, %U A019326 20587884010836553,16519105,60247241209,954437177,84327972908386521673,16773121,1152956690052710401,61083979321 %N A019326 Cyclotomic polynomials at x=8. %H A019326 Paolo Xausa, <a href="/A019326/b019326.txt">Table of n, a(n) for n = 0..1000</a> %H A019326 <a href="/index/Cy#CyclotomicPolynomialsValuesAtX">Index entries for cyclotomic polynomials, values at X</a> %p A019326 with(numtheory,cyclotomic); f := n->subs(x=8,cyclotomic(n,x)); seq(f(i),i=0..64); %t A019326 Join[{8}, Cyclotomic[Range[50], 8]] (* _Paolo Xausa_, Feb 26 2024 *) %o A019326 (Python) %o A019326 from sympy.polys.specialpolys import cyclotomic_poly %o A019326 def a(n): return 8 if n == 0 else cyclotomic_poly(n, x=8) %o A019326 print([a(n) for n in range(27)]) # _Michael S. Branicky_, Aug 07 2021 %o A019326 (PARI) a(n) = if (n==0, 8, polcyclo(n, 8)); \\ _Michel Marcus_, Aug 07 2021 %Y A019326 Cf. A020500 (x = 1), A019320-A019331 (x = 2..13). %K A019326 nonn %O A019326 0,1 %A A019326 _Simon Plouffe_