For successive x coordinates see A201047.
For successive y coordinates see A201269.
One elliptic curve with particular d can contain a finite number of extremal points.
Theorem (*Artur Jasinski*):
One elliptic curve cannot contain more than 1 extremal primary point with quadratic extension over rationals.
Consequence of this theorem is that any number in this sequence can't appear more than 1 time.
Conjecture (*Artur Jasinski*):
One elliptic curve cannot contain more than 1 point with quadratic extension over rationals.
Mordell elliptic curves contained points with extensions which are roots of polynomials : 2 degree (with Galois 2T1), 4 degree (with Galois 4T3) and 6 degree (with not soluble Galois PGL(2,5) <most of points {x,y} belonging here and rest are only rare exceptions>). Order of minimal polynomial of any extension have to divided number 12. Theoretically points can exist which are roots of polynomial of 3 degree but any such point isn't known yet.
Particular elliptic curves x^3y^2=d can contain more than one extremal point e.g. curve x^3y^2=297=a(8) contained 3 of such points with coordinates x={48, 1362, 93844}={A134105(7),A134105(8),A134105(9)}.
Conjecture (*Artur Jasinski*): Extremal points are kth successive points with maximal coordinates x.
