# A161954 (b-file synthesized from sequence entry)
0 1
1 27
2 377
3 3627
4 27026
5 166230
6 878409
7 4098483
8 17222607
9 66165501
10 235124461
11 780112671
12 2435132466
13 7196829486
14 20245295242
15 54455027238
16 140596223184
17 349621224120
18 839832229131
19 1953829030737
20 4412447681628
21 9693085025844