# A105557 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 10
4 32
5 128
6 626
7 3681
8 25574
9 206402
10 1908996
11 20024149
12 236142157
13 3106393358
14 45265833590
15 726249472784
16 12761749378320
17 244453274012442
18 5082582988294164
19 114258645210526486
20 2767462674168199303