( 1)
(3,
4,
5),
(6,
8, 10)
…
…
3n，4n，5n
(n is a positive integer)
(2)
(5, 12, 13)
,(
7,24,25),
(
9,40,4 1)
…
…
2n
+
1,
2n^2
+
2n，
2n^2
+
2n
+
1
(n is a positive integer)
(3)
(8, 15, 17),
( 12,35,37)
…
…
2^2*(n+ 1),[2(n+ 1)]^2- 1,[2(n+ 1)]^2+ 1
(n is a positive integer)
(4)m^2-n^2,2mn,m^2+n^2
(m and n are positive integers, m >；; n)
Simply list some:
three
four
five
five
12
13
seven
24
25
nine
40
4 1
1 1
60
6 1
13
84
Eighty-five
15
1 12
1 13
8, 15, 17
12,35,37
20,2 1,29
20,99, 10 1
48,55,73
60,9 1, 109