Problem: mysterious numbers

Code: mysterious+numbers/tails+%28whio%29_1771402494

Nibbles version: 0.2 | 0.21 | 0.22 | 0.23 | 0.24 | 0.25 | 1.00

Format: Compact | Simple | +Type | Table | JSON | .nbl (DeBruijn) | .nbl (names)

or / _ 
     | ;@ 
       - $ 
         ~ 
     `% @ 
        : + % $ 
              3 
            3 
          2 
   1