# A067644 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 2
4 6
5 30
6 62
7 382
8 1338
9 6216
10 29656
11 131316
12 669138
13 3156172
14 16032652
15 80104192
16 408448012
17 2105616701