# A305113 (b-file synthesized from sequence entry)
0 1
1 3
2 26
3 429
4 11140
5 413575
6 20732442
7 1349324599
8 110687183288
9 11178507440925
10 1363390073347730
11 197621842687876673
12 33583706596253821788
13 6613771286589113270611
14 1494257702398724584231946
15 383919965020249799260370355
16 111309986933239661174592643760
17 36168040052169465186266712298305
18 13090361918944129697134824216839154
19 5248357548475200108500930014786066693
20 2319429294524000405318027925169538777460