login
A152941
Odd squarefree numbers n such that the cyclotomic polynomial Phi(n,x) has height 3.
7
385, 595, 665, 935, 1155, 1235, 1309, 1463, 1495, 1729, 1855, 1955, 2065, 2261, 2465, 2665, 2795, 2821, 3045, 3059, 3115, 3145, 3289, 3451, 3619, 3655, 3857, 4123, 4277, 4389, 4403, 4433, 4669, 4697, 4745, 4807, 4879, 4935, 4945, 5015, 5083, 5117, 5285
OFFSET
1,1
COMMENTS
The height of a polynomial is the maximum of the absolute value of its coefficients. Subsequence of A154430.
PROG
(PARI) is(n)=issquarefree(n) && n%2 && vecmax(abs(Vec(polcyclo(n))))==3 \\ Charles R Greathouse IV, Nov 05 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
T. D. Noe, Dec 16 2008, Jan 09 2008
STATUS
approved