N=4
```cpp
/\
/__\
/\ /\
/__\/__\
/\ /\
/__\ /__\
/\ /\ /\ /\
/__\/__\/__\/__\
/\ /\
/__\ /__\
/\ /\ /\ /\
/__\/__\ /__\/__\
/\ /\ /\ /\
/__\ /__\ /__\ /__\
/\ /\ /\ /\ /\ /\ /\ /\
/__\/__\/__\/__\/__\/__\/__\/__\
```
by justforu @ 2023-09-01 13:21:54