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A320503 as a simple table

na(n)
11
22
33
44
56
68
79
85
97
1010
1112
1214
1315
1416
1518
1620
1721
1822
1924
2026
2127
2225
2328
2430
2532
2633
2734
2836
2938
3039
3135
3240
3342
3444
3545
3646
3748
3850
3951
4052
4154
4256
4357
4455
4549
4611
4713
4817
4919
5023
5129
5231
5337
5441
5543
5647
5753
5858
5960
6062
6163
6264
6366
6468
6569
6665
6770

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