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A233971 as a simple table

na(n)
00
11
22
32
44
52
64
76
88
92
104
116
1210
1310
148
1514
1616
172
184
196
2010
2110
2210
2318
2424
2522
268
2714
2822
2926
3016
3130
3232
332
344
356
3610
3710
3810
3918
4024
4122
4210
4318
4428
4538
4628
4746
4856
4954
508
5114
5222
5326
5422
5542
5656
5762
5816
5930
6046
6158
6232
6362
6464
652
664
676
6810
6910

[0,1,2,2,4,2,4,6,8,2,4,6,10,10,8,14,16,2,4,6,10,
 10,10,18,24,22,8,14,22,26,16,30,32,2,4,6,10,10,10,
 18,24,22,10,18,28,38,28,46,56,54,8,14,22,26,22,42,
 56,62,16,30,46,58,32,62,64,2,4,6,10,10]