# A176830 (b-file synthesized from sequence entry)
0 1
1 4
2 9
3 36
4 147
5 667
6 3163
7 15610
8 79121
9 409697
10 2157185
11 11514865
12 62167261
13 338870851
14 1862411885
15 10308811304
16 57417591755
17 321563019095
18 1809699812171
19 10229230730987
20 58047787492463
21 330576576766193