---ini-enunciat

>>> from indexmat import index_matriu

>>> it = index_matriu(4)
>>> next(it)
(1, 2)
>>> next(it)
(1, 3)
>>> for p in it:
...   print(p, end='-')
(1, 4)-(2, 3)-(2, 4)-(3, 4)-

---fi-enunciat

>>> for p in index_matriu(6):
...   print(p, end='-')
(1, 2)-(1, 3)-(1, 4)-(1, 5)-(1, 6)-(2, 3)-(2, 4)-(2, 5)-(2, 6)-(3, 4)-(3, 5)-(3, 6)-(4, 5)-(4, 6)-(5, 6)-

>>> for p in index_matriu(10):
...   print(p, end='-')
(1, 2)-(1, 3)-(1, 4)-(1, 5)-(1, 6)-(1, 7)-(1, 8)-(1, 9)-(1, 10)-(2, 3)-(2, 4)-(2, 5)-(2, 6)-(2, 7)-(2, 8)-(2, 9)-(2, 10)-(3, 4)-(3, 5)-(3, 6)-(3, 7)-(3, 8)-(3, 9)-(3, 10)-(4, 5)-(4, 6)-(4, 7)-(4, 8)-(4, 9)-(4, 10)-(5, 6)-(5, 7)-(5, 8)-(5, 9)-(5, 10)-(6, 7)-(6, 8)-(6, 9)-(6, 10)-(7, 8)-(7, 9)-(7, 10)-(8, 9)-(8, 10)-(9, 10)-