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$n\$d   1       2       3       4       5       6       7
1       1       1       1       1       1       1       1
...
18      1140    5985    26334   100947  346104  1081575 3124550
19      1330    7315    33649   134596  480700  1562275 4686825
20      1540    8855    42504   177100  657800  2220075 6906900

use strict;
use warnings;
...
      print("\n");
   }
}