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A130050 as a simple table

na(n)
13
27
312
420
529
639
750
863
977
1092
11108
12126
13145
14166
15188
16211
17235
18260
19286
20313
21341
22371
23402
24435
25469
26504
27540
28577
29615
30655
31696
32738
33781
34825
35870
36916
37963
381011
391060
401112
411165
421219
431274
441330
451387
461445
471504
481564
491625
501687
511751

[3,7,12,20,29,39,50,63,77,92,108,126,145,166,188,
 211,235,260,286,313,341,371,402,435,469,504,540,
 577,615,655,696,738,781,825,870,916,963,1011,1060,
 1112,1165,1219,1274,1330,1387,1445,1504,1564,1625,
 1687,1751]