# A153921 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 10
4 28
5 148
6 714
7 6039
8 49623
9 697824
10 9570390
11 228608398
12 5268376882
13 211052632687
14 8181458661819
15 550685739585810
16 35868897568521948
17 4059582510922093828
18 444431993377350866570
19 84536428851931450778591