# A013319 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 6
4 17
5 40
6 217
7 1358
8 6449
9 29712
10 182049
11 1270390
12 8227617
13 52843960
14 383647513
15 3038764542
16 23995450017
17 191131924256
18 1621685573121
19 14574192364646
20 133472613190001
21 1244028051397192
22 12068806481240601