# A003766 (b-file synthesized from sequence entry)
1 6
2 152
3 1608
4 15420
5 127980
6 1003360
7 7432708
8 53294540
9 371397240
10 2537155684
11 17047659916
12 113102692016
13 742597784164
14 4835184613212
15 31267479066856
16 201066698078244
17 1286998671857356
18 8206523391863296