# A125475 (b-file synthesized from sequence entry)
0 1
1 18
2 252
3 3168
4 44472
5 634368
6 9124092
7 131601852
8 1900243080
9 27449395092
10 396572715092
11 5729777752772
12 82786984432932
13 1196161590550776
14 17282993079833922
15 249717254801438778
16 3608098064502340024