# A089404 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 10
5 26
6 74
7 222
8 698
9 2264
10 7536
11 25600
12 88406
13 309440
14 1095354
15 3914340
16 14102324
17 51165004
18 186774368
19 685495334
20 2527957006