A306969 Numbers congruent to 1, 2, or 4 mod 7 that are not represented by x^2+7*y^2+7*z^2.

2, 22, 46, 58, 85, 93, 102, 205, 298, 310, 330, 358, 466, 478, 697, 862, 949, 1222, 1402, 1513, 1957, 1978, 2962, 3502, 7165, 10558

Offset: 1

Author

N. J. A. Sloane, Mar 26 2019

Keywords

• nonn
• more

Links

• Irving Kaplansky, The first nontrivial genus of positive definite ternary forms, Mathematics of Computation, Vol. 64 (1995): 341-345.

Crossrefs

Cf. A047350 (numbers congruent to {1, 2, 4} mod 7).