# A136356 (b-file synthesized from sequence entry)
1 4
2 6
3 9
4 15
5 30
6 105
7 420
8 1155
9 2310
10 15015
11 30030
12 255255
13 1021020
14 4849845
15 19399380
16 111546435
17 669278610
18 9704539845
19 38818159380
20 100280245065
21 601681470390
22 14841476269620
23 18551845337025
24 152125131763605