A179106 Integers n for which quintic x^5-x+/-n is the product of an irreducible quadratic and an irreducible cubic polynomials.

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.

Links

Table of n, a(n) for n=1..3.

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

Cf. A178868, A193524.

Sequence in context: A174304 A208461 A068939 * A157643 A340291 A104682

Adjacent sequences: A179103 A179104 A179105 * A179107 A179108 A179109

Keyword

nonn,bref,fini,full

Author

Artur Jasinski, Jun 29 2010

Extensions

Partially edited by N. J. A. Sloane, Jul 06 2010

Status

approved