# A026718 (b-file synthesized from sequence entry)
1 1
2 5
3 25
4 128
5 664
6 3468
7 18179
8 95486
9 502130
10 2642373
11 13910933
12 73254357
13 385819274
14 2032271705
15 10705592360
16 56397552658
17 297114357284
18 1565295609305
19 8246610192370
20 43446914289095
21 228899806427083
22 1205963067794476