# A291450 (b-file synthesized from sequence entry)
0 1
1 4
2 140
3 28
4 20020
5 4004
6 6466460
7 184756
8 148728580
9 29745716
10 133706993420
11 2431036244
12 449741705140
13 31885268
14 670910837521540
15 134182167504308
16 409926521725660940
17 4822664961478364
18 1278006214791766460
19 1921813856829724
20 242081282475556183660
21 4401477863191930612