# A091861 (b-file synthesized from sequence entry)
1 1
2 2
3 4
4 3
5 12
6 30
7 60
8 420
9 840
10 1260
11 630
12 27720
13 4620
14 60060
15 30030
16 120120
17 240240
18 2042040
19 3063060
20 232792560
21 58198140
22 38798760
23 19399380
24 446185740
25 892371480
26 2230928700
27 4461857400
28 40156716600
29 20078358300
30 582272390700