# A001930 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 33
5 139
6 718
7 4535
8 35979
9 363083
10 4717687
11 79501654
12 1744252509
13 49872339897
14 1856792610995
15 89847422244493
16 5637294117525695