# A342807 (b-file synthesized from sequence entry)
0 1
1 6
2 30
3 150
4 750
5 3750
6 18630
7 92406
8 458262
9 2270478
10 11245590
11 55697766
12 275769654
13 1365260862
14 6758345838
15 33450929886
16 165549052326
17 819248589606
18 4054005363918