# A026953 (b-file synthesized from sequence entry)
2 1
3 8
4 41
5 272
6 1168
7 7428
8 30302
9 189808
10 759101
11 4724160
12 18728841
13 116207424
14 458829051
15 2842936320
16 11203933255
17 69378730880
18 273211969075
19 1691519468760
20 6660034471595
21 41235710124400
22 162381981186970
23 1005560117623204
24 3961069262796800
25 24534901740913872