A094682 Discriminants of integer positive ternary quadratic forms that are spinor regular but not regular.

64, 108, 108, 128, 256, 256, 324, 343, 432, 432, 432, 1024, 1024, 1024, 1372, 1728, 2048, 3888, 4096, 4096, 4096, 5488, 6912, 6912, 16384, 16384, 27648, 62208, 87808

Offset: 1

Author

Will Jagy, Jun 03 2004

Keywords

• nonn
• fini
• full

Comments

List is believed to be complete.

References

• G. L. Watson: Integral Quadratic Forms (Cambridge, 1960).

Links

• W. K. Chan and A. G. Earnest, Discriminant bounds for spinor regular ternary quadratic lattices, J. London Math. Soc. (2) 69 (2004), no. 3, 545-561.
• W. C. Jagy, I. Kaplansky and A. Schiemann, There are 913 regular ternary forms, Mathematika 44(1997) 332-341.
• A. Schiemann, Ternary positive definite quadratic forms are determined by their theta series, Math. Ann. 308(1997) 507-517.