Yeah, it's not really easy but it's possible to create patterns which could create a valid kakuro, like the one below. You can switch around columns and rows as you please, but it will always have this basis for it.
I haven't actually tried this, because I find it kinda silly to have 1-cell sums in a kakuro.
Code:
.....x.....
.x.........
..x........
...x.......
....x......
x.........x
......x....
.......x...
........x..
.........x.
.....x.....