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A126949 as a simple table

na(n)
15
27
39
410
511
613
714
817
918
1019
1121
1222
1323
1425
1526
1627
1728
1829
1931
2033
2134
2235
2336
2437
2538
2639
2741
2842
2943
3044
3145
3246
3347
3449
3550
3652
3753
3854
3955
4056
4157
4258
4359
4461
4562
4663
4765
4866
4967
5069
5170
5271
5372
5473
5574
5675
5776
5877
5978
6079
6181
6282
6383
6484
6585
6686
6787
6888
6989
7090

[5,7,9,10,11,13,14,17,18,19,21,22,23,25,26,27,28,
 29,31,33,34,35,36,37,38,39,41,42,43,44,45,46,47,
 49,50,52,53,54,55,56,57,58,59,61,62,63,65,66,67,
 69,70,71,72,73,74,75,76,77,78,79,81,82,83,84,85,
 86,87,88,89,90]