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A305901 as a simple table

na(n)
11
22
33
44
55
64
74
86
94
104
117
124
138
149
154
164
1710
1811
194
2012
214
224
2313
244
2514
2615
274
2816
2917
304
314
3218
3319
344
3520
364
374
3821
3922
404
4123
424
4324
4425
454
4626
4727
4828
494
5029
514
524
5330
544
554
5631
574
5832
5933
6034
6135
6236
6337
644
6538
664
6739
6840
694
704
7141
7242
7343
7444
754
764
7745
7846
794
8047
8148
824
8349
844
8550
8651
874
8852
8953
904
914
9254
9355
9456
9557
964
974
9858
994
1004
10159
10260
10361

[1,2,3,4,5,4,4,6,4,4,7,4,8,9,4,4,10,11,4,12,4,4,
 13,4,14,15,4,16,17,4,4,18,19,4,20,4,4,21,22,4,23,
 4,24,25,4,26,27,28,4,29,4,4,30,4,4,31,4,32,33,34,
 35,36,37,4,38,4,39,40,4,4,41,42,43,44,4,4,45,46,4,
 47,48,4,49,4,50,51,4,52,53,4,4,54,55,56,57,4,4,58,
 4,4,59,60,61]