“…Ward, who made an extensive study of these sequences [24,25], shows that a proper elliptic divisibility sequence W is associated to a (possibly singular) elliptic curve E W and point P W ∈ E W (Q) and that the values of W n are closely related to the values of the division polynomials F n (P W ). More recently, elliptic divisibility sequences have been studied by Shipsey [19], who gives an application to the elliptic curve discrete logarithm problem, and by several other authors [3,4,5,8,9,10,23,22]. (See also [11,13,14] for work on the related Somos sequences.)…”