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 A120089 Square perimeters of primitive Pythagorean triangles. 2
 144, 900, 3136, 8100, 17424, 23716, 33124, 43264, 54756, 57600, 93636, 115600, 139876, 144400, 166464, 174724, 207936, 213444, 244036, 298116, 304704, 357604, 414736, 422500, 476100, 490000, 541696, 571536, 640000, 722500, 746496, 756900 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Square entries of A024364. LINKS Charlie Neder, Table of n, a(n) for n = 1..1000 P. Yiu, "Primitive Pythagorean triangles with square perimeters" in 'Recreational Mathematics' Chap. 6.2 pp. 50/360 FORMULA a(n) = (2*u*v)^2, where u=sqrt(j/2) and v=sqrt(j+k) {for coprime pairs (j,k),j>k with odd k such that pairs (u,v),u 0 && IntegerQ@Sqrt@k, Print[k]; Sow[k]]]][[2, 1]] (* Jean-François Alcover, Oct 25 2023 *) CROSSREFS Cf. A120090. Sequence in context: A234084 A223235 A187301 * A159748 A235957 A162669 Adjacent sequences: A120086 A120087 A120088 * A120090 A120091 A120092 KEYWORD nonn AUTHOR Lekraj Beedassy, Jun 07 2006 EXTENSIONS Corrected and extended by R. J. Mathar, Jun 08 2006 STATUS approved

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Last modified August 12 18:36 EDT 2024. Contains 375113 sequences. (Running on oeis4.)