# A209660 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 10
5 23
6 63
7 155
8 448
9 1152
10 3452
11 9158
12 28178
13 76539
14 240370
15 665128
16 2123437
17 5964658
18 19302248
19 54897742
20 179695133