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A308539 as a simple table

na(n)
11
22
34
48
516
63
76
812
95
1010
117
1214
139
1418
1511
1613
1715
1817
1919
2020
2122
2224
2326
2428
2530
2621
2732
2827
2934
3033
3136
3239
3342
3440
3544
3648
3752
3825
3938
4045
4156
4235
4351
4450
4555
4660
4754
4865
4966
5072
5149
5264
5378
5463
5584
5680
5788
5896
5981
60104
6123
6246
6368
6490
6599
66108
6729

[1,2,4,8,16,3,6,12,5,10,7,14,9,18,11,13,15,17,19,
 20,22,24,26,28,30,21,32,27,34,33,36,39,42,40,44,
 48,52,25,38,45,56,35,51,50,55,60,54,65,66,72,49,
 64,78,63,84,80,88,96,81,104,23,46,68,90,99,108,29]