# A168980 (b-file synthesized from sequence entry)
0 1
1 15
2 210
3 2940
4 41160
5 576240
6 8067360
7 112943040
8 1581202560
9 22136835840
10 309915701760
11 4338819824640
12 60743477544960
13 850408685629440
14 11905721598812160
15 166680102383370240
16 2333521433367183360