# A026901 (b-file synthesized from sequence entry)
3 1
4 10
5 68
6 396
7 2136
8 11062
9 56070
10 281306
11 1406721
12 7042818
13 35401568
14 178975192
15 910933936
16 4669860386
17 24114746282
18 125416122430
19 656713729000
20 3460748531510
21 18345703137458
22 97782896293158
23 523786141723670