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A028974 Numbers represented by quadratic form with Gram matrix [ 3, 1, 0; 1, 3, 1; 0, 1, 3 ]. 0
0, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 15, 16, 18, 19, 20, 21, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 54, 55, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 78, 79 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A183294 A039234 A025020 * A184427 A001965 A039178

Adjacent sequences:  A028971 A028972 A028973 * A028975 A028976 A028977

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified July 28 09:54 EDT 2021. Contains 346326 sequences. (Running on oeis4.)