A034169 Disjoint discriminants (one form per genus) of type 2.

1, 3, 5, 11, 15, 21, 29, 35, 39, 51, 65, 95, 105, 165, 231

Offset: 1

Author

Jonathan Borwein (jborwein(AT)cecm.sfu.ca), choi(AT)cecm.sfu.ca (Stephen Choi)

Keywords

• nonn
• fini
• full
• nice

References

• J. M. Borwein, D. H. Bailey and R. Girgensohn, Experimentation in Mathematics, A K Peters, Ltd., Natick, MA, 2004. x+357 pp. See p. 198.
• J. M. Borwein and P. B. Borwein, Pi and the AGM, page 293.
• L. E. Dickson, Introduction to the theory of numbers, Dover, NY, 1929.

Links

• J. Borwein and K.-K. S. Choi, On the representations of xy+yz+zx, Experimental Mathematics, 9 (2000), 153-158.
• Experimental Mathematics, Home Page

Crossrefs

Cf. A034168, A034170.

Formula

a(n) = A034168(n) / 2. - Sean A. Irvine, Aug 03 2020