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A375375 as a simple table

na(n)
11
22
33
45
54
67
76
88
910
1012
119
1211
1315
1416
1513
1614
1717
1818
1921
2022
2125
2226
2319
2420
2523
2624
2731
2832
2933
3034
3127
3228
3329
3430
3535
3636
3737
3838
3943
4044
4145
4246
4351
4452
4553
4654
4739
4840
4941
5042
5147
5248
5349
5450
5563
5664
5765
5866
5967
6068
6169
6270
6355
6456
6557
6658
6759
6860

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