The index calculation in sud[3*i%3+j%3][j/3] is incorrect. It doesn't check all blocks – it only checks the top left block.

This shouldn't pass the tests, and in fact it sometimes fails the random tests (with roughly 10% probability, according to my tests).

My solution has only 2 cycles, less code and clear enough :)

My solution on Java is the shortest and clear enough :)

Nice solution :)
But for input "n = 8" it returns incorrect result "-1 0 1 2 3 7 "
And also the redundant space " " in the end of String is always returned in results.