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A120358 as a simple table

na(n)
12
218
372
4450
51250
64050
716200
852488
956448
1064800
1171442
12101250
13198450
14235298
15285768
16328050
17405000
18793800
191036800
201312200
211620000
221786050
233175200
244572288
254961250
265248800
277144200
2812700800
2914289858
3015059072
3116074450
3219845000
3324012450
3425920000
3528576800

[2,18,72,450,1250,4050,16200,52488,56448,64800,
 71442,101250,198450,235298,285768,328050,405000,
 793800,1036800,1312200,1620000,1786050,3175200,
 4572288,4961250,5248800,7144200,12700800,14289858,
 15059072,16074450,19845000,24012450,25920000,
 28576800]