# A188914 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 19
4 97
5 601
6 4321
7 35281
8 322561
9 3265921
10 36288001
11 439084801
12 5748019201
13 80951270401
14 1220496076801
15 19615115520001
16 334764638208001
17 6046686277632001
18 115242726703104001
19 2311256907767808001
20 48658040163532800001
21 1072909785605898240001