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A220498 as a simple table

na(n)
00
12
22
32
44
52
64
74
84
96
104
116
128
132
144
154
166
1710
186
1914
208
2110
2214
238
2412
2514
264
278
288
2910
3016
3112
3222
3316
3416
3518
3612
3714
3816
3916
4016
4110
4212
4320
4414
4522
4622
4718
4818
4924
5018
5128
5218
5320
5428
5522
5628
5720
5818
5918
6022
6132
6232
6326
6424
6522
6628
6728
6832
6934
7020
7120
7228

[0,2,2,2,4,2,4,4,4,6,4,6,8,2,4,4,6,10,6,14,8,10,
 14,8,12,14,4,8,8,10,16,12,22,16,16,18,12,14,16,16,
 16,10,12,20,14,22,22,18,18,24,18,28,18,20,28,22,
 28,20,18,18,22,32,32,26,24,22,28,28,32,34,20,20,
 28]