# A076729 (b-file synthesized from sequence entry)
0 1
1 4
2 28
3 288
4 3984
5 70080
6 1506240
7 38384640
8 1133072640
9 38038533120
10 1431213235200
11 59645279232000
12 2726781752217600
13 135661078090137600
14 7295806823277772800
15 421717409630060544000
16 26071235813929033728000