A152942 Odd squarefree numbers n such that the cyclotomic polynomial Phi(n,x) has height 4.

1365, 1995, 2415, 2431, 2737, 2849, 3003, 3255, 3315, 3553, 3689, 4081, 4147, 4199, 4305, 4485, 4515, 4543, 4991, 5593, 5681, 5865, 6045, 6105, 6251, 6405, 6409, 6555, 6721, 6851, 7049, 7395, 7469, 7665, 7667, 7755, 7777, 7905, 8547, 8715, 8835, 9165

Offset: 1

Author

T. D. Noe, Dec 16 2008, Jan 09 2009

Keywords

• nonn

Comments

The height of a polynomial is the maximum of the absolute value of its coefficients. Subsequence of A154430.

Links

• T. D. Noe, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A152955, A152940, A152941, A152943.

Programs

PARI

is(n)=issquarefree(n) && n%2 && vecmax(abs(Vec(polcyclo(n))))==4 \\ Charles R Greathouse IV, Nov 05 2017