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

1,1

Links

Table of n, a(n) for n=1..26.

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).

Sequence in context: A350318 A080142 A364484 * A200946 A322157 A156454

Adjacent sequences: A306966 A306967 A306968 * A306970 A306971 A306972

Keyword

nonn,more

Author

N. J. A. Sloane, Mar 26 2019

Status

approved