# A071756 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 28
4 91
5 304
6 1036
7 3586
8 12571
9 44538
10 159222
11 573648
12 2080766
13 7592438
14 27850010
15 102638190
16 379859835
17 1411205250
18 5260849110
19 19673751960
20 73784984490
21 277457327160
22 1045879727568
23 3951343037220
24 14959393005886