OFFSET
1,2
LINKS
Robert Israel, Table of n, a(n) for n = 1..28
FORMULA
a(n) = C_n(A004124(n)) where A004124(n) is the discriminant of C_n(x) and C_n is the n-th cyclotomic polynomial. - Robert Israel, Jul 19 2016
EXAMPLE
C_4(x) = x^2 + 1 has discriminant -4 so a(4) = C_4(-4) = 17. - Robert Israel, Jul 19 2016
MAPLE
seq(numtheory:-cyclotomic(n, discrim(numtheory:-cyclotomic(n, x), x)), n=1..20); # Robert Israel, Jul 19 2016
MATHEMATICA
s = {}; Do[d = Discriminant[Cyclotomic[n, x], x]; AppendTo[s, Cyclotomic[n, d]], {n, 1, 20}]; s
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Mar 15 2010
EXTENSIONS
Edited by Robert Israel, Jul 19 2016
STATUS
approved