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A008740 as a simple table

na(n)
01
12
23
34
45
57
69
711
813
916
1019
1122
1225
1328
1432
1536
1640
1744
1849
1954
2059
2164
2269
2375
2481
2587
2693
27100
28107
29114
30121
31128
32136
33144
34152
35160
36169
37178
38187
39196
40205
41215
42225
43235
44245
45256
46267
47278
48289
49300
50312
51324
52336
53348
54361
55374
56387
57400
58413
59427
60441
61455
62469
63484

[1,2,3,4,5,7,9,11,13,16,19,22,25,28,32,36,40,44,
 49,54,59,64,69,75,81,87,93,100,107,114,121,128,
 136,144,152,160,169,178,187,196,205,215,225,235,
 245,256,267,278,289,300,312,324,336,348,361,374,
 387,400,413,427,441,455,469,484]