A070518 Value of n-th cyclotomic polynomial at n.

0, 3, 13, 17, 781, 31, 137257, 4097, 532171, 9091, 28531167061, 20593, 25239592216021, 7027567, 2392743361, 4294967297, 51702516367896047761, 34006393, 109912203092239643840221, 25536159601, 7006306553612521, 25405143539623, 949112181811268728834319677753

Offset

1,2

Links

G. C. Greubel, Table of n, a(n) for n = 1..250

Eric Weisstein's World of Mathematics, Cyclotomic Polynomial

Example

n=10: 10th cyclotomic polynomial is 1-x+x^2-x^3+x^4; at x=10 it gives a(10)=9091.

Maple

a:= n-> numtheory[cyclotomic](n$2):
seq(a(n), n=1..25);  # Alois P. Heinz, Jul 05 2024

Mathematica

Table[Cyclotomic[w, w], {w, 1, 35}]

Prog

(PARI) a(n) = polcyclo(n, n) \\ Michel Marcus, Apr 02 2016

Crossrefs

Cf. A070519 (indices of prime terms), A088790 (prime indices of prime terms).

Sequence in context: A006486 A368709 A273946 * A263182 A045525 A030774

Adjacent sequences: A070515 A070516 A070517 * A070519 A070520 A070521

Keyword

nonn

Author

Labos Elemer, May 02 2002

Status

approved