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A057282 as a simple table

na(n)
12
25
317
415
5120
6225
750
8700
93050
104080
11175
123775
1328625
1489225
1594440
16625
1719225
18223175
191208975
203006000
212666880
222250
2393500
241537100
2512689800
2654824650
27115299900
2889016480
298125
30438250
319670750
32112454500
33737744125

[2,5,17,15,120,225,50,700,3050,4080,175,3775,
 28625,89225,94440,625,19225,223175,1208975,
 3006000,2666880,2250,93500,1537100,12689800,
 54824650,115299900,89016480,8125,438250,9670750,
 112454500,737744125]