# A172392 (b-file synthesized from sequence entry)
0 1
1 4
2 30
3 280
4 2940
5 33264
6 396396
7 4907760
8 62573940
9 816621520
10 10861066216
11 146738321184
12 2008917492400
13 27815780664000
14 388924218927000
15 5484594083378400
16 77926940934668100
17 1114620641232714000