# A129017 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 4
5 4
6 12
7 19
8 19
9 46
10 70
11 70
12 162
13 239
14 239
15 504
16 726
17 726
18 1471
19 2062
20 2062