# A091200 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 11
4 44
5 185
6 802
7 3553
8 15994
9 72886
10 335387
11 1555487
12 7261310
13 34083382
14 160730900
15 761039051
16 3616102911
17 17235223345
18 82372594183
19 394648349447
20 1894921311499
21 9116598414141
22 43939539520427
23 212124129983285