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A113821 as a simple table

na(n)
11
22
33
45
56
67
74
812
913
1014
119
1211
1315
1417
1519
1610
1718
1820
1921
2022
2123
2225
2326
2427
2528
2629
2730
2831
298
3024
3140
3241
3342
3443
3544
3645
3733
3835
3937
4039
4146
4247
4349
4451
4553
4634
4738
4850
4954
5055
5156
5257
5358
5459
5560
5661
5762
5863
5965
6066
6167
6269
6370
6471
6572
6673
6736
6852
6968
7074
7175
7276
7377

[1,2,3,5,6,7,4,12,13,14,9,11,15,17,19,10,18,20,21,
 22,23,25,26,27,28,29,30,31,8,24,40,41,42,43,44,45,
 33,35,37,39,46,47,49,51,53,34,38,50,54,55,56,57,
 58,59,60,61,62,63,65,66,67,69,70,71,72,73,36,52,
 68,74,75,76,77]