# A215333 (b-file synthesized from sequence entry)
0 1
1 7
2 13
3 24
4 55
5 126
6 330
7 836
8 2232
9 5926
10 15932
11 42849
12 116011
13 314375
14 854952
15 2329162
16 6359574
17 17393334
18 47653952
19 130752976
20 359275056
21 988458426
22 2722803495