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A052207 as a simple table

na(n)
10
20
30
40
50
68
716
840
980
10168
11336
12672
131344
142640
155280
1610296
1720592
1840040
1980080
20155584
21311168
22604656
231209312
242351440
254702880
269152528
2718305056
2835659200
2971318400
30139070880
31278141760
32542911320
331085822640
342121460200
354242920400
368297266560

[0,0,0,0,0,8,16,40,80,168,336,672,1344,2640,5280,
 10296,20592,40040,80080,155584,311168,604656,
 1209312,2351440,4702880,9152528,18305056,35659200,
 71318400,139070880,278141760,542911320,1085822640,
 2121460200,4242920400,8297266560]