# A147431 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 3
7 9
8 19
9 43
10 151
11 665
12 3477
13 19383
14 122069
15 922803
16 8541115
17 92856889
18 1171563865
19 17291558591
20 299747161375
21 6126738372415
22 147219368035745
23 4156365837186519