# A018559 (b-file synthesized from sequence entry)
1 1
2 2
3 3
4 5
5 6
6 7
7 9
8 10
9 14
10 15
11 18
12 21
13 30
14 35
15 42
16 45
17 63
18 70
19 90
20 105
21 126
22 210
23 315
24 630