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A045980
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Numbers of the form x^3 + y^3 or x^3 - y^3.
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4
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0, 1, 2, 7, 8, 9, 16, 19, 26, 27, 28, 35, 37, 54, 56, 61, 63, 64, 65, 72, 91, 98, 117, 124, 125, 126, 127, 128, 133, 152, 169, 189, 208, 215, 216, 217, 218, 224, 243, 250, 271, 279, 280, 296, 316, 331, 335, 341, 342, 343, 344, 351, 370, 386, 387, 397, 407, 432
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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REFERENCES
| B. C. Berndt, Ramanujan's Notebooks Part IV, Springer-Verlag, see p. 86.
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
Kevin A. Broughan, Characterizing the Sum of Two Cubes, J. Integer Seqs., Vol. 6, 2003.
M. Kim, Diophantine equations in two variables
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EXAMPLE
| 7 = (2)^3 + (-1)^3.
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MATHEMATICA
| Union[Select[Sort[Flatten[Table[{j^3-i^3, j^3+i^3}, {i, 0, 20}, {j, i, 20}]]], #<20^3-19^3&]]
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CROSSREFS
| Sequence in context: A047354 A037455 A020675 * A104339 A199004 A168064
Adjacent sequences: A045977 A045978 A045979 * A045981 A045982 A045983
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KEYWORD
| nonn,easy,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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