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A028291 as a simple table

na(n)
01
12
24
37
411
517
625
735
848
964
1084
11108
12137
13171
14211
15258
16312
17374
18445
19525
20616
21718
22832
23959
241100
251256
261428
271617
281824
292050
302297
312565
322856
333171
343511
353878
364273
374697
385152
395639
406160
416716
427309
437940
448611
459324
4610080
4710881
4811729

[1,2,4,7,11,17,25,35,48,64,84,108,137,171,211,258,
 312,374,445,525,616,718,832,959,1100,1256,1428,
 1617,1824,2050,2297,2565,2856,3171,3511,3878,4273,
 4697,5152,5639,6160,6716,7309,7940,8611,9324,
 10080,10881,11729]