# A100948 (b-file synthesized from sequence entry)
2 1
3 1
4 2
5 2
6 3
7 6
8 8
9 12
10 24
11 40
12 60
13 120
14 240
15 360
16 720
17 1680
18 2520
19 5040
20 13440
21 20160
22 40320
23 120960
24 181440
25 362880
26 1209600
27 1814400
28 3628800