# A168344 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 15
4 99
5 773
6 6743
7 63591
8 635307
9 6634599
10 71759983
11 798563065
12 9098321475
13 105733563393
14 1249676348391
15 14986826364311
16 182027688352427
17 2235713532561779
18 27732857308708571
19 347064951865766607