# A030268 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 3
4 9
5 35
6 153
7 791
8 4597
9 29988
10 215804
11 1697291
12 14457059
13 132392971
14 1295346365
15 13468653637
16 148142236784
17 1716782858995
18 20889118889021