# A027137 (b-file synthesized from sequence entry)
0 1
1 9
2 40
3 163
4 606
5 2149
6 7378
7 24767
8 81784
9 266721
10 861426
11 2760523
12 8790108
13 27841469
14 87789916
15 275762167
16 863353934
17 2695201705
18 8392538682
19 26074810851
20 80850124228
21 250242934405
22 773288315888
23 2386084417999