# A124889 (b-file synthesized from sequence entry)
0 1
1 2
2 9
3 44
4 235
5 1296
6 7329
7 42104
8 244719
9 1434840
10 8470517
11 50280372
12 299806572
13 1794382548
14 10773855210
15 64865425760
16 391457133672
17 2367314649522
18 14342441005900
19 87035702613500
20 528938145043707
21 3218713327609648