# A278561 (b-file synthesized from sequence entry)
1 2
2 3
3 10
4 7
5 252
6 396
7 6435
8 858
9 680680
10 1175720
11 5290740
12 9360540
13 1029659400
14 617795640
15 116454478140
16 1061790830100
17 283144221360
18 74511637200
19 14060345939640
20 14060345939640
21 109530094869795600
22 650075097225840
23 51193413906534900
24 481218090721428060