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A308720 as a simple table

na(n)
00
10
22
32
40
54
64
74
84
90
106
116
126
136
146
156
160
178
188
198
208
218
228
238
248
250
2610
2710
2810
2910
3010
3110
3210
3310
3410
3510
360
3712
3812
3912
4012
4112
4212
4312
4412
4512
4612
4712
4812
490
5014
5114
5214
5314
5414
5514
5614
5714
5814
5914
6014
6114
6214
6314
640
6516
6616
6716
6816
6916
7016
7116

[0,0,2,2,0,4,4,4,4,0,6,6,6,6,6,6,0,8,8,8,8,8,8,8,
 8,0,10,10,10,10,10,10,10,10,10,10,0,12,12,12,12,
 12,12,12,12,12,12,12,12,0,14,14,14,14,14,14,14,14,
 14,14,14,14,14,14,0,16,16,16,16,16,16,16]