# A150151 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 20
4 74
5 274
6 1103
7 4366
8 18185
9 75130
10 320230
11 1358179
12 5888175
13 25443837
14 111664081
15 489304865
16 2168190791
17 9601100796
18 42882613069
19 191466467335
20 860762279600
21 3869278985555
22 17489846419136
23 79063930975662
24 359042915610462
25 1630838121006658
26 7435489235481713
27 33912055201761025