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A049032 as a simple table

na(n)
10
20
31
44
510
620
740
870
9112
10168
11252
12360
13495
14660
15880
161144
171456
181820
192275
202800
213400
224080
234896
245814
256840
267980
279310
2810780
2912397
3014168
3116192
3218400
3320800
3423400
3526325
3629484
3732886
3836540
3940600
4044950

[0,0,1,4,10,20,40,70,112,168,252,360,495,660,880,
 1144,1456,1820,2275,2800,3400,4080,4896,5814,6840,
 7980,9310,10780,12397,14168,16192,18400,20800,
 23400,26325,29484,32886,36540,40600,44950]