# A127498 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 16
4 53
5 186
6 672
7 2465
8 9158
9 34354
10 129833
11 493534
12 1884955
13 7227522
14 27804584
15 107268790
16 414852381
17 1607836478
18 6243201267
19 24282747900
20 94587991975
21 368940451638
22 1440796181876
23 5632827891526
24 22043782012620