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A227215 as a simple table

na(n)
13
24
35
45
57
66
79
86
97
108
1113
127
1315
1410
159
168
1719
188
1921
209
2111
2214
2325
249
2511
2616
279
2811
2931
3010
3133
3210
3315
3420
3513
3610
3739
3822
3917
4011
4143
4212
4345
4415
4511
4626
4749
4811
4915
5012
5121
5217
5355
5412
5517
5613
5723
5832
5961
6012
6163
6234
6313
6412
6519
6616
6769
6821
6927
7014
7173
7213
7375
7440
7513

[3,4,5,5,7,6,9,6,7,8,13,7,15,10,9,8,19,8,21,9,11,
 14,25,9,11,16,9,11,31,10,33,10,15,20,13,10,39,22,
 17,11,43,12,45,15,11,26,49,11,15,12,21,17,55,12,
 17,13,23,32,61,12,63,34,13,12,19,16,69,21,27,14,
 73,13,75,40,13]