# A366495 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 16
4 74
5 366
6 1900
7 10210
8 56315
9 317005
10 1813860
11 10518652
12 61684208
13 365177622
14 2179549853
15 13100686947
16 79232836206
17 481821573994
18 2944253855746
19 18069720545174
20 111333779015326
21 688399685561554
22 4270250156814421
23 26567075153764929