# A093468 (b-file synthesized from sequence entry)
1 1
2 2
3 3
4 6
5 18
6 78
7 438
8 2958
9 23118
10 204558
11 2018958
12 21977358
13 261478158
14 3374988558
15 46964134158
16 700801318158
17 11162196262158
18 189005910310158
19 3390192763174158
20 64212742967590158
21 1280663747055910158