# A300583 (b-file synthesized from sequence entry)
0 1
1 6
2 54
3 378
4 2754
5 17982
6 121014
7 765450
8 4894506
9 30429918
10 189311094
11 1160312850
12 7113869226
13 43228473822
14 262556300286
15 1587419581410
16 9590551158474
17 57795130268694
18 348125978482686
19 2093918636332530
20 12590534397102930
21 75647788993941174