A028968 Numbers represented by quadratic form with Gram matrix [ 2, 1, 1; 1, 2, 1; 1, 1, 3 ].

0, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 34, 35, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 58, 59, 60, 61, 62, 63, 66, 67, 69, 70, 71, 72, 74, 75, 76, 77, 78, 79, 80, 82, 83

Offset

1,2

Comments

Where does this first differ from A028962? - R. J. Mathar, Jul 22 2025

Links

Table of n, a(n) for n=1..68.

Crossrefs

Sequence in context: A028745 A028777 A028962 * A029598 A184004 A183292

Adjacent sequences: A028965 A028966 A028967 * A028969 A028970 A028971

Keyword

nonn

Author

N. J. A. Sloane

Status

approved