# A144281 (b-file synthesized from sequence entry)
1 1
2 4
3 25
4 265
5 3793
6 70789
7 1600429
8 42811078
9 1316981794
10 45858363502
11 1781106761686
12 76349861206627
13 3579325969675135
14 182170488961796899
15 10002072131444031160
16 589261706147357617009
17 37076870479319887575253
18 2481442922857293505594237