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 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Not every term is cubefree; some are sb^3 where s is in A159843 and b > 1. LINKS Rosalie Fay, Table of n, a(n) for n = 1..165 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 Cf. A023050 (positive cubes); A293650 (allows noncoprime); A293646, A293648 Sequence in context: A031556 A265625 A014441 * A212948 A204471 A139778 Adjacent sequences: A293648 A293649 A293650 * A293652 A293653 A293654 KEYWORD nonn AUTHOR Rosalie Fay, Oct 16 2017 STATUS approved

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Last modified December 2 04:17 EST 2023. Contains 367506 sequences. (Running on oeis4.)