# A180072 (b-file synthesized from sequence entry)
2 2
3 2
4 12
5 62
6 384
7 2574
8 20432
9 183790
10 1833102
11 20075568
12 240972780
13 3128714960
14 43794182164
15 656192916356
16 10493589363960
17 178319646743428