# A047017 (b-file synthesized from sequence entry)
0 1
1 3
2 10
3 34
4 120
5 434
6 1593
7 5916
8 22173
9 83695
10 317739
11 1212014
12 4641637
13 17836092
14 68736489
15 265562956
16 1028262867
17 3989193141
18 15503022891
19 60341894022
20 235193502470
21 917862682778
22 3586131005790
23 14025784709984