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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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

PROG

(PARI) is(n)=issquarefree(n) && n%2 && vecmax(abs(Vec(polcyclo(n))))==3 \\ Charles R Greathouse IV, Nov 05 2017

CROSSREFS

Cf. A152955, A152940, A152942, A152943.

Sequence in context: A227974 A069043 A013591 * A229853 A317272 A157354

Adjacent sequences:  A152938 A152939 A152940 * A152942 A152943 A152944

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified June 6 10:35 EDT 2020. Contains 334842 sequences. (Running on oeis4.)