# A030820 (b-file synthesized from sequence entry)
1 1
2 2
3 8
4 35
5 177
6 1064
7 7453
8 59629
9 536666
10 5366663
11 59033296
12 708399560
13 9209194286
14 128928720014
15 1933930800218
16 30942892803488
17 526029177659298
18 9468525197867367
19 179901978759479980
20 3598039575189599601