# A215072 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 4
5 12
6 40
7 153
8 638
9 2825
10 12938
11 60458
12 285664
13 1358283
14 6480694
15 30979999
16 148249768
17 709832688
18 3399805736
19 16286469156
20 78026226228
21 373832145200
22 1791120945112