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A273786 as a simple table

na(n)
15
27
38
49
510
613
717
818
919
1021
1122
1223
1324
1425
1526
1627
1728
1829
1930
2031
2132
2233
2335
2437
2538
2640
2741
2842
2943
3044
3145
3246
3348
3449
3550
3651
3753
3854
3955
4057
4160
4261
4362
4463
4564
4665
4767
4868
4969
5070
5171
5273
5374
5475
5576
5677
5778
5879
5980
6081
6182
6285
6389
6491
6593
6694

[5,7,8,9,10,13,17,18,19,21,22,23,24,25,26,27,28,
 29,30,31,32,33,35,37,38,40,41,42,43,44,45,46,48,
 49,50,51,53,54,55,57,60,61,62,63,64,65,67,68,69,
 70,71,73,74,75,76,77,78,79,80,81,82,85,89,91,93,
 94]