# A180071 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 6
4 12
5 24
6 98
7 344
8 1236
9 5332
10 23772
11 110962
12 547714
13 2840028
14 15439466
15 87299850
16 512569668
17 3111575102
18 19577613014
19 127331688104
20 852129210498
21 5853657714546
22 41377621755100
23 300511333393982
24 2233952140321104