# A090856 (b-file synthesized from sequence entry)
0 1
1 7
2 27
3 104
4 378
5 1327
6 4553
7 15351
8 51072
9 168147
10 548915
11 1779377
12 5734022
13 18384612
14 58688163
15 186632570
16 591509670
17 1869118923
18 5890466415
19 18518945789
20 58094637801
21 181884111404
22 568416743474
23 1773443888599