# A121654 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 41
5 150
6 568
7 2115
8 7974
9 30307
10 115063
11 436831
12 1659809
13 6306619
14 24210855
15 93152526
16 357925365
17 1384070472
18 5365825156
19 20791117843
20 80784911668
21 314369613909
22 1223297887923
23 4773716056341
24 18647712778338