# A037556 (b-file synthesized from sequence entry)
1 2
2 15
3 106
4 744
5 5209
6 36464
7 255250
8 1786751
9 12507258
10 87550808
11 612855657
12 4289989600
13 30029927202
14 210209490415
15 1471466432906
16 10300265030344
17 72101855212409
18 504712986486864
19 3532990905408050