Squares from D(–4) and D(20) Triples

References

[1] E. Brown, “Sets in Which Is Always a Square,” Mathematics of Computation, Vol. 45, No. 172, 1985, pp. 613-620.

[2] N. Sloane, On-Line Encyclopedia of Integer Sequences. http://www.research.att.com/ njas/sequences/.

[3] L. Euler, “Commentationes Arithmeticae I,” Opera Omnia, Series I, volume II, B.G. Teubner, Basel, 1915.

[4] Z. ?erin, “On Pencils of Euler Triples I,” (in press).

[5] Z. ?erin, “On Pencils of Euler Triples II,” (in press).

[6] M. Radi?, “A Definition of Determinant of Rectangular Matrix,” Glasnik Mate-maticki, Vol. 1, No. 21, 1966, pp. 17-22.