# A067324 (b-file synthesized from sequence entry)
0 2
1 7
2 23
3 76
4 255
5 869
6 3003
7 10504
8 37128
9 132430
10 476102
11 1723528
12 6277505
13 22988385
14 84592275
15 312636240
16 1159979700
17 4319218530
18 16134883410
19 60452176200
20 227110782990
21 855361970034
22 3228982640478