# A324853 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 30
4 330
5 4290
6 60060
7 1021020
8 29609580
9 917896980
10 33962188260
11 1290563153880
12 52913089309080
13 2275262840290440
14 106937353493650680
15 6309303856125390120
16 422723358360401138040
17 30013358443588480800840
18 2190975166381959098461320