# A020032 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 1
4 5
5 23
6 123
7 788
8 5853
9 49330
10 465113
11 4850460
12 55433829
13 688963306
14 9251792972
15 133490155744
16 2059562402903
17 33835668047686
18 589707357402530
19 10867464157846630
20 211139303638163097
21 4313274345751046120