%I #19 Jul 05 2024 21:20:02
%S 0,3,13,17,781,31,137257,4097,532171,9091,28531167061,20593,
%T 25239592216021,7027567,2392743361,4294967297,51702516367896047761,
%U 34006393,109912203092239643840221,25536159601,7006306553612521,25405143539623,949112181811268728834319677753
%N Value of n-th cyclotomic polynomial at n.
%H G. C. Greubel, <a href="/A070518/b070518.txt">Table of n, a(n) for n = 1..250</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/CyclotomicPolynomial.html">Cyclotomic Polynomial</a>
%e n=10: 10th cyclotomic polynomial is 1-x+x^2-x^3+x^4; at x=10 it gives a(10)=9091.
%p a:= n-> numtheory[cyclotomic](n$2):
%p seq(a(n), n=1..25); # _Alois P. Heinz_, Jul 05 2024
%t Table[Cyclotomic[w, w], {w, 1, 35}]
%o (PARI) a(n) = polcyclo(n, n) \\ _Michel Marcus_, Apr 02 2016
%Y Cf. A070519 (indices of prime terms), A088790 (prime indices of prime terms).
%K nonn
%O 1,2
%A _Labos Elemer_, May 02 2002