ELLIPTIC CURVES CONTAINING SEQUENCES OF CONSECUTIVE CUBES

Let E be an elliptic curve over Q described by y(2) = x(3)+Kx+L, where K, L is an element of Q. A set of rational points (x(i), y(i)) is an element of E(Q) for i = 1, 2,..., k, is said to be a sequence of consecutive cubes on E if the x-coordinates of the points x(i)'s for i = 1, 2,..., form consecutive cubes. In this note, we show the existence of an infinite family of elliptic curves containing a length-5-term sequence of consecutive cubes. Moreover, these five rational points in E(Q) are linearly independent, and the rank r of E(Q) is at least 5.