# A143552 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 22
4 115
5 1048
6 6418
7 63784
8 421195
9 4386273
10 30271136
11 324599018
12 2306033386
13 25228297188
14 182938978344
15 2030788315648
16 14952369357211
17 167836915812087
18 1250429798513035
19 14158770843121424
20 106483223789898776