L'esercizio dei numeri

What number is this:

Please first try saying the numbers out loud horizontally (3 13 30...) and then jump around (12 90 1).


1           10            11

 
2          12             20         22


3          13            30          33


4           14           40          44


5           15          50           55


6           16          60           66


7           17          70            77


8           18         80             88


9           19        90               99