# A193617 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 1
4 1
5 2
6 4
7 8
8 18
9 43
10 107
11 282
12 771
13 2167
14 6241
15 18421
16 55309
17 168845
18 524728
19 1649764