# A342288 (b-file synthesized from sequence entry)
0 2
1 5
2 28
3 210
4 1848
5 18018
6 188760
7 2085798
8 24018280
9 285817532
10 3493769552
11 43672119400
12 556315613280
13 7202300350500
14 94561966954800
15 1256886144107550
16 16888191533829000
17 229116465142280100
18 3135277944052254000
19 43238333101156993800
20 600502564063273528800