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A289439 as a simple table

na(n)
21
31
42
51
63
72
84
93
105
112
126
133
147
155
168
174
189
194
2010
217
2211
235
2412
255
2613
279
2814
296
3015
316
3216
3311
3417
3510
3618
378
3819
3913
4020
418
4221
439
4422
4515
4623
4710
4824
4914
5025
5117
5226
5311
5427
5511
5628
5719
5829
5912
6030
6112
6231
6321
6432
6515
6633
6714
6834
6923
7035

[1,1,2,1,3,2,4,3,5,2,6,3,7,5,8,4,9,4,10,7,11,5,12,
 5,13,9,14,6,15,6,16,11,17,10,18,8,19,13,20,8,21,9,
 22,15,23,10,24,14,25,17,26,11,27,11,28,19,29,12,
 30,12,31,21,32,15,33,14,34,23,35]