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A152423 as a simple table

na(n)
11
22
32
44
52
64
76
88
92
104
116
128
1310
1412
1514
1616
172
184
196
208
2110
2212
2314
2416
2518
2620
2722
2824
2926
3028
3130
3232
332
344
356
368
3710
3812
3914
4016
4118
4220
4322
4424
4526
4628
4730
4832
4934
5036
5138
5240
5342
5444
5546
5648
5750
5852
5954
6056
6158
6260
6362
6464
652
664
676
688
6910
7012
7114
7216
7318
7420

[1,2,2,4,2,4,6,8,2,4,6,8,10,12,14,16,2,4,6,8,10,
 12,14,16,18,20,22,24,26,28,30,32,2,4,6,8,10,12,14,
 16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,
 48,50,52,54,56,58,60,62,64,2,4,6,8,10,12,14,16,18,
 20]