# A147726 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 16
5 54
6 232
7 936
8 3880
9 17302
10 81584
11 425550
12 2332858
13 13639774
14 84416970
15 555549406
16 3834425860
17 27937916790