What this question actually mean, I did t understand ? Please help!

Question

https://cses.fi/problemset/task/1072

Answer 1

This question says that suppose you have two knights(move diagonally)
and you wanna place them in k*k chessboard so that they can not attack(simply no in diagonal with other knight)
You need to tell the number of ways to do that

Answer 2

And also you have to print answer for each k (1<=k<=n) (simply 1 to k)