# A073268 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 3
4 8
5 20
6 58
7 179
8 576
9 1902
10 6426
11 22092
12 77026
13 271702
14 967840
15 3476555
16 12578728
17 45800278
18 167693698
19 617037126
20 2280467586
21 8461771342
22 31510700712
23 117725789124
24 441141656810
25 1657559677646
26 6243810767912