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A152942 Odd squarefree numbers n such that the cyclotomic polynomial Phi(n,x) has height 4. 7
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 (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))))==4 \\ Charles R Greathouse IV, Nov 05 2017

CROSSREFS

Cf. A152955, A152940, A152941, A152943.

Sequence in context: A028486 A281479 A013592 * A043686 A043578 A004970

Adjacent sequences:  A152939 A152940 A152941 * A152943 A152944 A152945

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified August 14 19:47 EDT 2020. Contains 336483 sequences. (Running on oeis4.)