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A212988 as a simple table

na(n)
01
11
22
34
47
59
612
716
821
925
1030
1136
1243
1349
1456
1564
1673
1781
1890
19100
20111
21121
22132
23144
24157
25169
26182
27196
28211
29225
30240
31256
32273
33289
34306
35324
36343
37361
38380
39400
40421
41441
42462
43484
44507
45529
46552
47576
48601
49625
50650
51676
52703
53729
54756
55784

[1,1,2,4,7,9,12,16,21,25,30,36,43,49,56,64,73,81,
 90,100,111,121,132,144,157,169,182,196,211,225,
 240,256,273,289,306,324,343,361,380,400,421,441,
 462,484,507,529,552,576,601,625,650,676,703,729,
 756,784]