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A002347 as a simple table

na(n)
11
21
32
41
53
63
72
84
91
103
115
125
133
146
151
167
173
186
195
203
217
226
239
249
255
268
274
2810
299
307
313
3211
333
349
351
3611
3712
388
3910
4012
419
4211
435
449
4513
463
476
481
4913
503
512
5210
538
5415
5515
567
579
5813
591
6015
6114
6215
6315
645
653
6615
6712
684
6917
709
7115
7211
7315
7414
755
766
7718
782
7916
807
8113
8217
8311
8418

[1,1,2,1,3,3,2,4,1,3,5,5,3,6,1,7,3,6,5,3,7,6,9,9,
 5,8,4,10,9,7,3,11,3,9,1,11,12,8,10,12,9,11,5,9,13,
 3,6,1,13,3,2,10,8,15,15,7,9,13,1,15,14,15,15,5,3,
 15,12,4,17,9,15,11,15,14,5,6,18,2,16,7,13,17,11,
 18]