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A194974 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1213
1314
1415
1512
1616
1719
1820
1921
2017
2118
2222
2326
2427
2528
2623
2724
2825
2929
3034
3135
3236
3330
3431
3532
3633
3737
3843
3944
4045
4138
4240
4341
4442
4539
4646
4753
4854
4955
5047
5150
5251
5352
5448
5549
5656
5764
5865
5966
6057
6161
6262
6363
6458
6559
6660
6767
6876
6977

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