# A208898 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 9
4 72
5 880
6 14946
7 331177
8 9157984
9 305879724
10 12036430600
11 547226046939
12 28298540270928
13 1643380366183920
14 106042236588594096
15 7535372761616117625
16 585204851983514095424
17 49344635724104556446660
18 4491848127809479571999928
19 439231681095730953672503448