# A107321 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 3
4 8
5 14
6 42
7 79
8 254
9 506
10 1702
11 3548
12 12320
13 26666
14 94794
15 211751
16 766362
17 1758352
18 6453812
19 15150922
20 56238710
21 134659120