# A161221 (b-file synthesized from sequence entry)
0 1
1 4
2 9
3 20
4 51
5 136
6 414
7 1300
8 4371
9 15084
10 53508
11 192700
12 703346
13 2589304
14 9603954
15 35824240
16 134285331
17 505421344
18 1909144014
19 7234153420
20 27488865564
21 104717491064
22 399826699734
23 1529763696820
24 5864079144466
25 22518031691368
26 86607753541164