# A317718 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 4
5 7
6 13
7 27
8 55
9 125
10 278
11 650
12 1510
13 3624
14 8655
15 21017
16 51212
17 125857
18 310581
19 770767
20 1920226