# A180144 (b-file synthesized from sequence entry)
0 1
1 4
2 13
3 46
4 163
5 580
6 2065
7 7354
8 26191
9 93280
10 332221
11 1183222
12 4214107
13 15008764
14 53454505
15 190381042
16 678052135
17 2414918488
18 8600859733
19 30632416174
20 109098967987
21 388561736308
22 1383883144897
23 4928772907306