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A331162 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1112
1213
1314
1415
1516
1617
1718
1819
1920
2020
2122
2223
2324
2425
2526
2627
2728
2829
2930
3030
3132
3233
3334
3435
3536
3637
3738
3839
3940
4040
4142
4243
4344
4445
4546
4647
4748
4849
4950
5050
5152
5253
5354
5455
5556
5657
5758
5859
5960
6060
6162
6263
6364
6465
6566
6667
6768
6869
6970
7070
7172
7273
7374
7475
7576
7677
7778
7879
7980
8080

[0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,
 20,20,22,23,24,25,26,27,28,29,30,30,32,33,34,35,
 36,37,38,39,40,40,42,43,44,45,46,47,48,49,50,50,
 52,53,54,55,56,57,58,59,60,60,62,63,64,65,66,67,
 68,69,70,70,72,73,74,75,76,77,78,79,80,80]