# A129328 (b-file synthesized from sequence entry)
0 0
1 0
2 1
3 9
4 72
5 570
6 4635
7 39186
8 345828
9 3188268
10 30684150
11 307870365
12 3215425554
13 34899450768
14 393015753039
15 4585024011015
16 55332235452960
17 689799432341928
18 8871905851132041
19 117581467377389310
20 1603990651356920730