# 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