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A200067 as a simple table

na(n)
00
10
20
31
43
56
612
720
830
945
1063
1184
12112
13144
14180
15225
16275
17330
18396
19468
20546
21637
22735
23840
24960
251088
261224
271377
281539
291710
301900
312100
322310
332541
342783
353036
363312
373600
383900
394225
404563
414914
425292
435684
446090
456525
466975
477440
487936
498448

[0,0,0,1,3,6,12,20,30,45,63,84,112,144,180,225,
 275,330,396,468,546,637,735,840,960,1088,1224,
 1377,1539,1710,1900,2100,2310,2541,2783,3036,3312,
 3600,3900,4225,4563,4914,5292,5684,6090,6525,6975,
 7440,7936,8448]