# A222052 (b-file synthesized from sequence entry)
0 1
1 3
2 25
3 210
4 1881
5 17303
6 162214
7 1540710
8 14776281
9 142774455
10 1387743525
11 13553773500
12 132906406950
13 1307654814222
14 12902933709922
15 127632756058610
16 1265251299930585
17 12566655467547195
18 125025126985317013
19 1245750306517239978
20 12429515281592007781