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A161203 as a simple table

na(n)
12
26
312
421
531
643
759
875
994
10114
11136
12161
13188
14217
15247
16279
17315
18353
19391
20431
21474
22518
23564
24613
25663
26715
27770
28826
29884
30946
311008
321075
331142
341211
351282
361354
371428
381505
391583

[2,6,12,21,31,43,59,75,94,114,136,161,188,217,247,
 279,315,353,391,431,474,518,564,613,663,715,770,
 826,884,946,1008,1075,1142,1211,1282,1354,1428,
 1505,1583]