# A163124 (b-file synthesized from sequence entry)
0 1
1 20
2 380
3 7220
4 136990
5 2599200
6 49316400
7 935712000
8 17753871510
9 336855735180
10 6391382632020
11 121267853544780
12 2300893742387430
13 43656351283440360
14 828320305398630840
15 15716259104684097960