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A109470 as a simple table

na(n)
12
25
39
414
520
627
736
846
957
1069
1182
1296
13111
14127
15144
16162
17181
18201
19222
20244
21267
22291
23316
24342
25370
26399
27429
28460
29492
30525
31559
32594
33630
34667
35705
36744
37784
38825
39867
40910
41954
42999
431045
441092
451140
461189
471239
481290
491342
501395
511449
521504
531560

[2,5,9,14,20,27,36,46,57,69,82,96,111,127,144,162,
 181,201,222,244,267,291,316,342,370,399,429,460,
 492,525,559,594,630,667,705,744,784,825,867,910,
 954,999,1045,1092,1140,1189,1239,1290,1342,1395,
 1449,1504,1560]