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A179106
Integers n for which quintic x^5-x+/-n is the product of an irreducible quadratic and an irreducible cubic polynomials.
1
15, 22440, 2759640
OFFSET
1,1
COMMENTS
Rabinowitz in 1968 showed that this list is complete.
REFERENCES
Rabinowitz S., 1968. Math. Mag. 61 p.191-193.
MATHEMATICA
aa = {}; Do[Do[If[(-a^3 b + 2 a b^2 != 0) && ((-a^4 + 3 a^2 b - b^2) == -1), AppendTo[aa, Abs[ -a^3 b + 2 a b^2]]], {a, 1, 12}], {b, 1, 377}]; aa (*Artur Jasinski*)
CROSSREFS
Sequence in context: A174304 A208461 A068939 * A157643 A340291 A104682
KEYWORD
nonn,bref,fini,full
AUTHOR
Artur Jasinski, Jun 29 2010
EXTENSIONS
Partially edited by N. J. A. Sloane, Jul 06 2010
STATUS
approved