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A181640 as a simple table

na(n)
00
10
20
31
44
59
616
725
837
953
1073
1197
12125
13158
14197
15242
16293
17350
18414
19486
20566
21654
22750
23855
24970
251095
261230
271375
281531
291699
301879
312071
322275
332492
342723
352968
363227
373500
383788
394092
404412
414748
425100
435469
445856
456261
466684
477125
487585
498065
508565

[0,0,0,1,4,9,16,25,37,53,73,97,125,158,197,242,
 293,350,414,486,566,654,750,855,970,1095,1230,
 1375,1531,1699,1879,2071,2275,2492,2723,2968,3227,
 3500,3788,4092,4412,4748,5100,5469,5856,6261,6684,
 7125,7585,8065,8565]