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A121538 as a simple table

na(n)
11
22
34
46
57
68
710
811
912
1014
1116
1218
1319
1420
1522
1624
1726
1827
1928
2030
2131
2232
2334
2435
2536
2638
2740
2842
2943
3044
3146
3247
3348
3450
3551
3652
3754
3856
3958
4059
4160
4262
4364
4466
4567
4668
4770
4872
4974
5075
5176
5278
5379
5480
5582
5683
5784
5886
5988
6090
6191
6292
6394
6496
6598
6699
67100

[1,2,4,6,7,8,10,11,12,14,16,18,19,20,22,24,26,27,
 28,30,31,32,34,35,36,38,40,42,43,44,46,47,48,50,
 51,52,54,56,58,59,60,62,64,66,67,68,70,72,74,75,
 76,78,79,80,82,83,84,86,88,90,91,92,94,96,98,99,
 100]