# A356259 (b-file synthesized from sequence entry)
1 0
2 2
3 6
4 60
5 500
6 7290
7 100842
8 1978368
9 38263752
10 949218750
11 23579476910
12 709026379776
13 21505924728444
14 760772509715764
15 27246730957031250
16 1109165339867873280
17 45798768824157052688
18 2109518949433090534902