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A066892 as a simple table

na(n)
13
24
32
48
56
613
76
85
95
1012
116
127
1310
149
158
1613
177
1813
1910
209
2113
225
2310
2413
2511
267
2711
285
299
3013
319
3214
339
3412
359
368
3713
3813
398
4011
4110
4218
4310
4414
454
4616
4715
489
4913
505
5111
5216
5314
547
5510
5612
5710
5818
5912
6014
6113
6212
6314
6411
6512
6620
6717
6811
697
7013
717
7210
739
7412
7510
7617
779
7815
799
809

[3,4,2,8,6,13,6,5,5,12,6,7,10,9,8,13,7,13,10,9,13,
 5,10,13,11,7,11,5,9,13,9,14,9,12,9,8,13,13,8,11,
 10,18,10,14,4,16,15,9,13,5,11,16,14,7,10,12,10,18,
 12,14,13,12,14,11,12,20,17,11,7,13,7,10,9,12,10,
 17,9,15,9,9]