# A011831 (b-file synthesized from sequence entry)
1 2
2 3
3 5
4 10
5 26
6 96
7 553
8 5461
9 100708
10 3617645
11 173567527
12 6366566540
13 158639466203
14 2814676722153
15 37776715520590
16 402955577714030
17 3548682190216501
18 26572504193848015
19 173131916047617788