# A291286 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 16
4 88
5 632
6 5552
7 57824
8 695776
9 9500128
10 145097152
11 2451080192
12 45373649024
13 913400022656
14 19865889564928
15 464227147597312
16 11599471170191872
17 308605525316616704
18 8709955613991289856
19 259922447412719218688
20 8177253768239405504512