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A039953 as a simple table

na(n)
11
21
32
41
53
62
71
83
95
102
111
123
136
142
155
161
173
186
198
205
212
221
233
245
256
267
2710
282
291
304
317
3213
332
348
356
363
371
385
394
4013
413
428
437
4412
452
461
473
489
4915
505
5114
527
5310
546
552
562
574
5818
595
6011
613
6212
6313
647
651
669
672
683
6920
7012
716
7216
7311
7415
754
769
771
787

[1,1,2,1,3,2,1,3,5,2,1,3,6,2,5,1,3,6,8,5,2,1,3,5,
 6,7,10,2,1,4,7,13,2,8,6,3,1,5,4,13,3,8,7,12,2,1,3,
 9,15,5,14,7,10,6,2,2,4,18,5,11,3,12,13,7,1,9,2,3,
 20,12,6,16,11,15,4,9,1,7]