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A229144 as a simple table

na(n)
00
11
22
34
44
56
68
79
89
910
1011
1113
1213
1315
1417
1518
1618
1719
1820
1922
2022
2124
2226
2327
2427
2528
2629
2731
2831
2933
3035
3136
3236
3337
3438
3540
3640
3742
3844
3945
4045
4146
4247
4349
4449
4551
4653
4754
4854
4955
5056
5158
5258
5360
5462
5563
5663
5764
5865
5967
6067
6169
6271
6372
6472
6573
6674
6776
6876
6978
7080
7181
7281
7382
7483
7585
7685
7787
7889

[0,1,2,4,4,6,8,9,9,10,11,13,13,15,17,18,18,19,20,
 22,22,24,26,27,27,28,29,31,31,33,35,36,36,37,38,
 40,40,42,44,45,45,46,47,49,49,51,53,54,54,55,56,
 58,58,60,62,63,63,64,65,67,67,69,71,72,72,73,74,
 76,76,78,80,81,81,82,83,85,85,87,89]