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A238198 Triangle of the discriminant of the polynomials x^n - x^m + 1, where 0 < m < n. 5
-3, -23, -23, 229, 144, 229, 2869, 3017, 3017, 2869, -43531, -33856, -19683, -33856, -43531, -776887, -811043, -816631, -816631, -811043, -776887, 15953673, 13424896, 16692841, 5308416, 16692841, 13424896, 15953673, 370643273, 384126317, 239483061 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Boyd et al. mention these numbers.

LINKS

T. D. Noe, Rows n = 1..100 of triangle, flattened

David W. Boyd, Greg Martin, and Mark Thom, Squarefree values of trinomial discriminants, arXiv 1402.5148 [math.NT], 2014.

William Craig, Cubefree Trinomial Discriminants, arXiv:1901.03653 [math.NT], 2019.

MATHEMATICA

Flatten[Table[Discriminant[x^n - x^m + 1, x], {n, 2, 9}, {m, n - 1}]]

CROSSREFS

Cf. A238195 (discriminant of x^n - x^m - 1).

Cf. A238196 (discriminant of x^n + x^m - 1).

Cf. A238197 (discriminant of x^n + x^m + 1).

Cf. A238199 (union).

Sequence in context: A298885 A298657 A299609 * A178177 A124076 A153834

Adjacent sequences:  A238195 A238196 A238197 * A238199 A238200 A238201

KEYWORD

sign,tabl

AUTHOR

T. D. Noe, Feb 24 2014

STATUS

approved

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Last modified February 29 02:07 EST 2020. Contains 332353 sequences. (Running on oeis4.)