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Numbers congruent to 1, 2, or 4 mod 7 that are not represented by x^2+7*y^2+7*z^2.
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%I #11 Mar 27 2019 03:46:57

%S 2,22,46,58,85,93,102,205,298,310,330,358,466,478,697,862,949,1222,

%T 1402,1513,1957,1978,2962,3502,7165,10558

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

%H Irving Kaplansky, <a href="https://doi.org/10.1090/S0025-5718-1995-1265017-2">The first nontrivial genus of positive definite ternary forms</a>, Mathematics of Computation, Vol. 64 (1995): 341-345.

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

%K nonn,more

%O 1,1

%A _N. J. A. Sloane_, Mar 26 2019