OFFSET

1,2

COMMENTS

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

REFERENCES

H. Cohn, A second course in number theory, John Wiley & Sons, Inc., New York-London, 1962. see page 3.

LINKS

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

FORMULA

List contains 0 and all positive n such that 2*A035170(n) = A028586(n) is nonzero. - Michael Somos, Oct 21 2006

CROSSREFS

KEYWORD

nonn

AUTHOR

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Mar 29 2000

STATUS

approved