# A218407 (b-file synthesized from sequence entry)
1 30
2 140
3 2480
4 6200
5 40640
6 297600
7 997920
8 64995840
9 167751680
10 1502582400
11 42949345280
12 183196016640
13 687193456640
14 1447428787200
15 63870637017600
16 326676430080000
17 20797363851264000
18 24871926476966400
19 42981218625945600
20 404918548479244800