# A194349 (b-file synthesized from sequence entry)
1 1
2 2
3 5
4 24
5 129
6 960
7 7965
8 80640
9 903105
10 11612160
11 163451925
12 2554675200
13 43259364225
14 797058662400
15 15764670046125
16 334764638208000
17 7571150452490625
18 182111963185152000
19 4634731528895593125
20 124564582818643968000