# A108209 (b-file synthesized from sequence entry)
0 0
1 2
2 10
3 92
4 1320
5 25664
6 628400
7 18544032
8 640243520
9 25313036288
10 1127562249600
11 55871851754240
12 3048145476992000
13 181547804177418240
14 11721355489130393600
15 815411545722159841280
16 60804225264488076288000