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A055052 Numbers of the form 4^i*(8j+7) or 4^i*(8j+5). 1
5, 7, 13, 15, 20, 21, 23, 28, 29, 31, 37, 39, 45, 47, 52, 53, 55, 60, 61, 63, 69, 71, 77, 79, 80, 84, 85, 87, 92, 93, 95, 101, 103, 109, 111, 112, 116, 117, 119, 124, 125, 127, 133, 135, 141, 143, 148, 149, 151, 156, 157, 159, 165, 167, 173, 175 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers not of the form x^2+2y^2+8z^2.

REFERENCES

L. J. Mordell, A new Waring's problem with squares of linear forms, Quart. J. Math., 1 (1930), 276-288 (see p. 283).

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

Sequence in context: A314313 A339921 A066980 * A314314 A314315 A047550

Adjacent sequences:  A055049 A055050 A055051 * A055053 A055054 A055055

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 02 2000

STATUS

approved

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Last modified October 21 05:28 EDT 2021. Contains 348141 sequences. (Running on oeis4.)