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A319681 as a simple table

na(n)
11
22
33
44
55
66
76
87
98
109
119
1210
1311
1412
1513
1614
1715
1816
1917
2018
2119
2220
2320
2421
2522
2623
2723
2824
2925
3026
3127
3228
3329
3430
3531
3632
3733
3834
3935
4036
4137
4238
4339
4440
4541
4642
4742
4843
4944
5045
5146
5247
5348
5449
5550
5651
5752
5853
5953
6054
6155
6249
6356
6457
6558
6659
6760
6861
6962
7063
7164
7265
7366
7467
7568
7669
7770
7871
7972
8073
8174
8275
8375
8476
8577
8678
8779
8880
8981

[1,2,3,4,5,6,6,7,8,9,9,10,11,12,13,14,15,16,17,18,
 19,20,20,21,22,23,23,24,25,26,27,28,29,30,31,32,
 33,34,35,36,37,38,39,40,41,42,42,43,44,45,46,47,
 48,49,50,51,52,53,53,54,55,49,56,57,58,59,60,61,
 62,63,64,65,66,67,68,69,70,71,72,73,74,75,75,76,
 77,78,79,80,81]