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A088558
Least odd leg of primitive Pythagorean triangles with even leg 4n.
12
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
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Nov 17 2003
EXTENSIONS
Extended by Ray Chandler, Jul 14 2004
STATUS
approved