# A153915 (b-file synthesized from sequence entry)
0 1
1 2
2 3
3 6
4 8
5 23
6 56
7 204
8 561
9 2634
10 9589
11 57271
12 263195
13 2051213
14 12518144
15 126095265
16 984855718
17 12768865644
18 128552370071
19 2154052520419
20 28007473176570
21 606579298687089
22 10205582308897812
23 285438654888054564