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 A356712 Numbers k such that Mordell's equation y^2 = x^3 + k^3 has exactly 7 integral solutions. 7
 2, 18, 50, 56, 57, 98, 112, 114, 148, 162, 224, 228, 273, 280, 330, 336, 338, 364, 448, 504, 513, 578 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Cube root of A179151. LINKS Table of n, a(n) for n=1..22. EXAMPLE 2 is a term since the equation y^2 = x^3 + 2^3 has 3 solutions (-2,0), (1,+-3), (2,+-4), and (46,+-312). CROSSREFS Cf. A081119, A179145, A179147, A179149, A179151, A356709, A356710, A356711. Indices of 7 in A356706, of 3 in A356707, and of 4 in A356708. Sequence in context: A208652 A223469 A048910 * A077591 A050808 A058653 Adjacent sequences: A356709 A356710 A356711 * A356713 A356714 A356715 KEYWORD nonn,hard,more AUTHOR Jianing Song, Aug 23 2022 STATUS approved

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Last modified May 26 16:43 EDT 2024. Contains 372840 sequences. (Running on oeis4.)