# A162661 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 7
4 33
5 189
6 1249
7 9237
8 74972
9 659042
10 6215154
11 62435805
12 664459091
13 7458334388
14 87979090059
15 1087309348481
16 14041705640439
17 189050930463638
18 2648140182064473
19 38521885088392896
20 580970615943277573