# A027328 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 46
4 329
5 2430
6 18356
7 141154
8 1101414
9 8699526
10 69424347
11 558927258
12 4534296817
13 37030215650
14 304192728417
15 2511887607302
16 20838602265827
17 173599625623046
18 1451661032992437
19 12180539352299690
20 102522996378621787
21 865395766743359034