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A220080 as a simple table

na(n)
00
11
21
32
44
53
63
72
84
92
104
116
128
1310
1412
1514
1616
176
188
1910
2012
216
228
2310
2412
252
264
276
288
2910
3012
3114
3216
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

[0,1,1,2,4,3,3,2,4,2,4,6,8,10,12,14,16,6,8,10,12,
 6,8,10,12,2,4,6,8,10,12,14,16,2,4,6,8,10,12,14,16,
 18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,
 50,52,54]