# A365182 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 33
4 252
5 2091
6 18319
7 166750
8 1561599
9 14948572
10 145615404
11 1438752770
12 14384289530
13 145248707646
14 1479212551278
15 15175516654760
16 156691764630780
17 1627069871618145
18 16980373299730925
19 178006989972532900
20 1873607777794186000