# A052703 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 1
4 3
5 12
6 49
7 210
8 927
9 4191
10 19305
11 90285
12 427570
13 2046324
14 9881862
15 48090824
16 235619133
17 1161257580
18 5753365015
19 28638093270
20 143148398085