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A337138 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1617
1718
1819
1920
2021
2122
2223
2324
2425
2526
2627
2728
2829
2930
3031
3133
3234
3335
3437
3538
3639
3740
3841
3942
4043
4144
4245
4346
4447
4549
4650
4751
4853
4954
5055
5156
5257
5358
5459
5560
5661
5762
5863
5965
6066
6167
6269
6370
6471
6573
6674

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,17,18,19,20,
 21,22,23,24,25,26,27,28,29,30,31,33,34,35,37,38,
 39,40,41,42,43,44,45,46,47,49,50,51,53,54,55,56,
 57,58,59,60,61,62,63,65,66,67,69,70,71,73,74]