# A091521 (b-file synthesized from sequence entry)
0 1
1 4
2 12
3 28
4 84
5 212
6 632
7 1544
8 4584
9 11220
10 33060
11 80152
12 234648
13 565192
14 1643552
15 3926832
16 11337422
17 26852656
18 76981660