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A238199
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Sorted absolute value of discriminant of the polynomials x^n +- x^m +- 1, where 0 < m < n.
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5
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3, 5, 23, 31, 144, 229, 283, 400, 2869, 3017, 3233, 3381, 19683, 33856, 43531, 49781, 61504, 91125, 776887, 811043, 816631, 830455, 836043, 870199, 5308416, 13424896, 15953673, 16692841, 16861591, 17600759, 20502784, 40960000, 239483061, 370643273
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OFFSET
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1,1
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LINKS
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T. D. Noe, Table of n, a(n) for n = 1..5000
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.
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MATHEMATICA
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Table[Discriminant[x^n + u x^m + v, x] // Abs, {n, 2, 9}, {m, 1, n-1}, {u, {-1, 1}}, {v, {-1, 1}}] // Flatten // Union (* Jean-François Alcover, Dec 04 2018 *)
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CROSSREFS
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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. A238198 (discriminant of x^n - x^m + 1).
Sequence in context: A106282 A163153 A339414 * A296927 A215132 A091157
Adjacent sequences: A238196 A238197 A238198 * A238200 A238201 A238202
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KEYWORD
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nonn
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AUTHOR
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T. D. Noe, Feb 24 2014
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STATUS
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approved
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