# A218410 (b-file synthesized from sequence entry)
1 840
2 55860
3 1089270
4 3666432
5 5322240
6 8714160
7 10281600
8 20109600
9 21785400
10 32104800
11 9904204800
12 10334134272
13 4660073935104
14 7322605472000
15 11887123248000
16 15387946358400
17 78599399424000
18 516876560449536
19 750304684523520
20 812193794048000