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A240977 as a simple table

na(n)
00
11
22
34
45
57
68
710
811
913
1014
1116
1217
1319
1420
1521
1623
1724
1826
1927
2029
2130
2232
2333
2435
2536
2638
2739
2841
2942
3043
3145
3246
3348
3449
3551
3652
3754
3855
3957
4058
4160
4261
4362
4464
4565
4667
4768
4870
4971
5073
5174
5276
5377
5479
5580
5682
5783
5884

[0,1,2,4,5,7,8,10,11,13,14,16,17,19,20,21,23,24,
 26,27,29,30,32,33,35,36,38,39,41,42,43,45,46,48,
 49,51,52,54,55,57,58,60,61,62,64,65,67,68,70,71,
 73,74,76,77,79,80,82,83,84]