# A001888 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 4
5 21
6 122
7 849
8 6719
9 59873
10 593686
11 6483027
12 77309508
13 999569969
14 13927664613
15 208044077633
16 3316415176712
17 56193522437465
18 1008499234742158
19 19110533105114433
20 381290148293261075
21 7989548583615385153
22 175418232627066361514
23 4027213499971769192903
24 96489861550805864197512