

A293651


Sum of two (possibly negative) coprime cubes in at least 3 ways, but not the sum of 2 noncoprime cubes.


4



3367, 68913, 152551, 195841, 625177, 684019, 1147627, 1548729, 2113921, 2628073, 2985983, 3242197, 3442887, 4488211, 4663295, 4931101, 5318677, 7194889, 8741691, 9667693, 14110579, 15072967, 15438185, 16776487, 21463407, 22910797, 24769502, 26122131, 26460217
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OFFSET

1,1


COMMENTS

Not every term is cubefree; some are sb^3 where s is in A159843 and b > 1.


LINKS



EXAMPLE

21463407 = 271^3 + 116^3 = 284^3  113^3 = 368^3  305^3, and 271 & 116 are coprime, etc., so 21463407 is in the sequence.


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



