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A100310 as a simple table

na(n)
01
18
250
3400
42402
519216
6120100
7960800
85764802
946118416
10288240100
112305920800
1213847054404
13110776435232
14692352720200
155538821761600
1633232930569602
17265863444556816
181661646528480100
1913293172227840800

[1,8,50,400,2402,19216,120100,960800,5764802,
 46118416,288240100,2305920800,13847054404,
 110776435232,692352720200,5538821761600,
 33232930569602,265863444556816,1661646528480100,
 13293172227840800]