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A055047 Numbers of the form 9^i*(3*j+1). +0
1
1, 4, 7, 9, 10, 13, 16, 19, 22, 25, 28, 31, 34, 36, 37, 40, 43, 46, 49, 52, 55, 58, 61, 63, 64, 67, 70, 73, 76, 79, 81, 82, 85, 88, 90, 91, 94, 97, 100, 103, 106, 109, 112, 115, 117, 118, 121, 124, 127, 130, 133, 136, 139, 142, 144, 145, 148, 151 (list; graph; listen)
OFFSET

1,2

COMMENT

The numbers not of the form 2x^2+3y^2+3z^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).

CROSSREFS

Sequence in context: A010389 A010415 A010442 this_sequence A010454 A053169 A007656

Adjacent sequences: A055044 A055045 A055046 this_sequence A055048 A055049 A055050

KEYWORD

nonn

AUTHOR

njas, Jun 01 2000

page 1

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.


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