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A028722 Square classes of 2-adic rationals. 0
0, 1, 2, 3, 5, 6, 7, 10, 14 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 368.

W. Scharlau, Quadratic and Hermitian Forms, Springer, p. 186.

LINKS

Table of n, a(n) for n=0..8.

CROSSREFS

Sequence in context: A183071 A139826 A182048 * A030050 A018336 A194359

Adjacent sequences:  A028719 A028720 A028721 * A028723 A028724 A028725

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 17 19:37 EST 2019. Contains 320223 sequences. (Running on oeis4.)