# A068134 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 3
4 7
5 12
6 56
7 109
8 368
9 1332
10 5656
11 28248
12 140547
13 774325
14 8485151
15 34339452
16 397492132
17 3996973827
18 63229707890
19 1039037824132