# A164627 (b-file synthesized from sequence entry)
0 1
1 16
2 240
3 3600
4 54000
5 810000
6 12150000
7 182249880
8 2733746400
9 41006169120
10 615092133600
11 9226375956000
12 138395548620000
13 2075931868500000
14 31138957615514280
15 467084058053130000
16 7006256278106196720