# A371042 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 6
4 12
5 140
6 1470
7 10122
8 114296
9 1874952
10 25462170
11 379431470
12 7546461252
13 151797222876
14 3066316693622
15 72101615826450
16 1843378516587120
17 47860832586054032
18 1338908395558366386
19 40675047500003794902
20 1282380661224172506620