# A173489 (b-file synthesized from sequence entry)
1 1
2 2
3 4
4 10
5 32
6 133
7 706
8 4542
9 33770
10 284519
11 2694100
12 28292286
13 324935676
14 4052477864
15 54679031852
16 793359552994
17 12294933375782
18 202713354823112
19 3547535843321377
20 65667058958304601
21 1280634899889213903