# A000759 (b-file synthesized from sequence entry)
0 1
1 4
2 12
3 44
4 172
5 772
6 3308
7 14924
8 64956
9 294252
10 1301044
11 5930588
12 26506948
13 121290940
14 546050988
15 2505533940
16 11340303508
17 52147596788
18 236995050900
19 1091701675948
20 4977541017540
21 22961416861940
22 104965762062612