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 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 (list; graph; refs; listen; history; text; internal format)
 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 Rosalie Fay, Table of n, a(n) for n = 1..664 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 Cf. A051383 (all solutions); A003825 (positive cubes); A293651 (only coprime); A293645, A293647 Sequence in context: A234652 A050219 A051383 * A233962 A203672 A203665 Adjacent sequences: A293647 A293648 A293649 * A293651 A293652 A293653 KEYWORD nonn AUTHOR Rosalie Fay, Oct 16 2017 STATUS approved

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Last modified May 30 07:51 EDT 2023. Contains 363050 sequences. (Running on oeis4.)