# A026893 (b-file synthesized from sequence entry)
3 1
4 15
5 144
6 1137
7 8070
8 53678
9 342224
10 2119359
11 12856752
12 76826324
13 453947206
14 2659486160
15 15479103062
16 89636939038
17 517014933254
18 2972784038825
19 17051188983758
20 97611767361074
21 557935896092592
22 3185250335024206