# A037547 (b-file synthesized from sequence entry)
1 1
2 8
3 50
4 301
5 1808
6 10850
7 65101
8 390608
9 2343650
10 14061901
11 84371408
12 506228450
13 3037370701
14 18224224208
15 109345345250
16 656072071501
17 3936432429008
18 23618594574050
19 141711567444301
20 850269404665808
21 5101616427994850