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A134102 Complete list of solutions to y^2 = x^3 + 225; sequence gives y values. 4

%I #5 Dec 25 2022 15:09:12

%S 3,10,15,17,21,35,60,165,465,2415,6159,6576,611085363

%N Complete list of solutions to y^2 = x^3 + 225; sequence gives y values.

%C For corresponding x values see A134103.

%e a(1)^2 = 3^2 = 9 = A134103(1)^3 + 225 = -216 + 225.

%e a(2)^2 = 10^2 = 100 = A134103(2)^3 + 225 = -125 + 225.

%e a(3)^2 = 15^2 = 225 = A134103(3)^3 + 225 = 0 + 225.

%e a(4)^2 = 17^2 = 289 = A134103(4)^3 + 225 = 64 + 225.

%e a(5)^2 = 21^2 = 441 = A134103(5)^3 + 225 = 216 + 225.

%e a(6)^2 = 35^2 = 1225 = A134103(6)^3 + 225 = 1000 + 225.

%e a(7)^2 = 60^2 = 3600 = A134103(7)^3 + 225 = 3375 + 225.

%e a(8)^2 = 165^2 = 27225 = A134103(8)^3 + 225 = 27000 + 225.

%e a(9)^2 = 465^2 = 216225 = A134103(9)^3 + 225 = 216000 + 225.

%e a(10)^2 = 2415^2 = 5832225 = A134103(10)^3 + 225 = 5832000 + 225.

%e a(11)^2 = 6159^2 = 37933281 = A134103(11)^3 + 225 = 37933056 + 225.

%e a(12)^2 = 6576^2 = 43243776 = A134103(12)^3 + 225 = 43243551 + 225.

%e a(13)^2 = 611085363^2 = 373425320872841769 = A134103(13)^3 + 225 = 373425320872841544 + 225.

%t Select[Table[Sqrt[x^3+225],{x,-6,721000}],IntegerQ] (* _Harvey P. Dale_, Dec 25 2022 *)

%o (Magma) { x : x in Sort([ Abs(p[2]) : p in IntegralPoints(EllipticCurve([0, 225])) ]) }; /* adapted from A029727 */

%Y Cf. A134103, A134104, A134106, A029727, A134043, A134073.

%K nonn,fini,full

%O 1,1

%A _Klaus Brockhaus_, Oct 08 2007

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Last modified April 25 13:02 EDT 2024. Contains 371969 sequences. (Running on oeis4.)