

A293650


Sum of two (possibly negative) cubes in at least 3 ways (primitive solutions).


4



728, 3367, 4104, 5859, 46683, 65728, 68913, 101528, 124488, 134379, 152551, 155736, 165464, 168112, 184464, 195841, 205352, 289224, 333944, 342657, 402597, 439101, 622232, 625177, 684019, 754299, 757701, 842751, 845208, 1009736, 1016496, 1062936, 1073375
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OFFSET

1,1


COMMENTS

Primitive means that the 6 summands are coprime. Not every term is the sum of two coprime cubes. a(1) = A047696(3).


LINKS



EXAMPLE

4104 = 18^3  12^3 = 16^3 + 2^3 = 15^3 + 9^3, and 18, 12, 16, 2, 15, 9 are coprime, so 4104 is in the sequence.


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



