# A354327 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 3
4 22
5 180
6 1902
7 23730
8 344872
9 5706288
10 105960600
11 2181449160
12 49311653616
13 1214109056160
14 32339248301808
15 926527371653520
16 28410493609687680
17 928335829570087680
18 32201658919855225728
19 1181755749910942408320
20 45744743939940787150080