A324940 Numbers of the form x^2+7*y^2+7*z^2.

0, 1, 4, 7, 8, 9, 11, 14, 15, 16, 18, 23, 25, 28, 29, 30, 32, 35, 36, 37, 39, 43, 44, 49, 50, 51, 53, 56, 57, 60, 63, 64, 65, 67, 70, 71, 72, 74, 77, 78, 79, 81, 84, 86, 88, 91, 92, 95, 99, 100, 105, 106, 107, 109, 112, 113, 114, 116, 119, 120, 121

Offset

1,3

Comments

Complement of A306296

Links

Table of n, a(n) for n=1..61.

Mathematica

Take[Union[Flatten[Table[a^2 + 7 b^2 + 7 c^2, {a, 0, 20}, {b, 0, 20}, {c, 0, 20}]]], 200]

Crossrefs

Cf. A306296.

Sequence in context: A262874 A309264 A161986 * A020670 A253472 A255060

Adjacent sequences: A324937 A324938 A324939 * A324941 A324942 A324943

Keyword

nonn

Author

Vincenzo Librandi, Mar 27 2019

Status

approved