A088558 Least odd leg of primitive Pythagorean triangles with even leg 4n.

3, 15, 5, 63, 21, 7, 45, 255, 77, 9, 117, 55, 165, 33, 11, 1023, 285, 65, 357, 39, 13, 105, 525, 247, 621, 153, 725, 15, 837, 119, 957, 4095, 85, 273, 51, 17, 1365, 345, 133, 231, 1677, 95, 1845, 57, 19, 513, 2205, 1015, 2397, 609, 253, 105, 2805, 713, 21, 207, 325

Offset

1,1

Links

Jean-François Alcover, Table of n, a(n) for n = 1..1000

Mathematica

a[n_] := 2k + 1 /. Solve[k > 0 && 1 < h < 2k + 1 + 4n && (2k + 1)^2 + (4n)^2 == h^2 && GCD[2k + 1, 4n, h] == 1, {k, h}, Integers][[1]];
a /@ Range[57] (* Jean-François Alcover, Mar 05 2020 *)

Crossrefs

Cf. A088557, A096891-A096900.

Sequence in context: A009215 A274078 A302782 * A212203 A286783 A351697

Adjacent sequences: A088555 A088556 A088557 * A088559 A088560 A088561

Keyword

nonn

Author

Lekraj Beedassy, Nov 17 2003

Extensions

Extended by Ray Chandler, Jul 14 2004

Status

approved