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A238195 Triangle of the discriminant of the polynomials x^n - x^m - 1, where 0 < m < n. 5
5, -23, -31, -283, -400, -283, 2869, 3233, 3017, 3381, 49781, 33856, 91125, 61504, 49781, -776887, -836043, -816631, -830455, -811043, -870199, -17600759, -20502784, -16861591, -40960000, -16861591, -20502784, -17600759, 370643273, 390714661, 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. A238196 (discriminant of x^n + x^m - 1).

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

Cf. A238198 (discriminant of x^n - x^m + 1).

Cf. A238199 (union).

Sequence in context: A065867 A071199 A082283 * A231002 A329160 A050906

Adjacent sequences:  A238192 A238193 A238194 * A238196 A238197 A238198

KEYWORD

sign,tabl

AUTHOR

T. D. Noe, Feb 24 2014

STATUS

approved

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Last modified January 23 04:16 EST 2020. Contains 331168 sequences. (Running on oeis4.)