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A001307 as a simple table

na(n)
01
12
24
36
410
514
620
726
835
944
1057
1170
1288
13106
14130
15154
16185
17216
18255
19294
20344
21394
22456
23518
24595
25672
26765
27858
28970
291082
301216
311350
321509
331668
341855
352042
362260
372478
382730
392982
403274
413566
423901
434236
444620
455004
465440
475876
486370
496864

[1,2,4,6,10,14,20,26,35,44,57,70,88,106,130,154,
 185,216,255,294,344,394,456,518,595,672,765,858,
 970,1082,1216,1350,1509,1668,1855,2042,2260,2478,
 2730,2982,3274,3566,3901,4236,4620,5004,5440,5876,
 6370,6864]