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A279891 as a simple table

na(n)
00
12
22
34
44
54
66
76
86
96
108
118
128
138
148
1510
1610
1710
1810
1910
2010
2112
2212
2312
2412
2512
2612
2712
2814
2914
3014
3114
3214
3314
3414
3514
3616
3716
3816
3916
4016
4116
4216
4316
4416
4518
4618
4718
4818
4918
5018
5118
5218
5318
5418
5520
5620
5720
5820
5920
6020
6120
6220
6320
6420
6520
6622
6722
6822
6922
7022
7122
7222
7322
7422
7522
7622
7722

[0,2,2,4,4,4,6,6,6,6,8,8,8,8,8,10,10,10,10,10,10,
 12,12,12,12,12,12,12,14,14,14,14,14,14,14,14,16,
 16,16,16,16,16,16,16,16,18,18,18,18,18,18,18,18,
 18,18,20,20,20,20,20,20,20,20,20,20,20,22,22,22,
 22,22,22,22,22,22,22,22,22]