# A147887 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 24
5 96
6 528
7 2418
8 14676
9 109882
10 996240
11 7675118
12 67181516
13 718155492
14 8798220008
15 93512144280
16 1080953807952