# A107375 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 2
4 6
5 29
6 161
7 928
8 5388
9 31333
10 182269
11 1060358
12 6168762
13 35887625
14 208781333
15 1214615068
16 7066195896
17 41108599753
18 239155126777
19 1391318970218
20 8094196026894
21 47089136800949
22 273947751857609
23 1593730016014072