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A111384 as a simple table

na(n)
00
10
20
31
44
59
618
730
848
970
10100
11135
12180
13231
14294
15364
16448
17540
18648
19765
20900
211045
221210
231386
241584
251794
262028
272275
282548
292835
303150
313480
323840
334216
344624
355049
365508
375985
386498
397030
407600
418190
428820
439471
4410164
4510879
4611638
4712420
4813248

[0,0,0,1,4,9,18,30,48,70,100,135,180,231,294,364,
 448,540,648,765,900,1045,1210,1386,1584,1794,2028,
 2275,2548,2835,3150,3480,3840,4216,4624,5049,5508,
 5985,6498,7030,7600,8190,8820,9471,10164,10879,
 11638,12420,13248]