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A100470 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1110
1211
1311
1412
1512
1613
1713
1814
1914
2015
2115
2216
2316
2417
2517
2618
2718
2819
2919
3020
3120
3221
3321
3422
3522
3623
3723
3824
3924
4025
4125
4226
4326
4427
4527
4628
4728
4829
4929
5030
5130
5231
5331
5432
5532
5633
5733
5834
5934
6035
6135
6236
6336
6437
6537
6638
6738
6839
6939
7040
7140
7241

[0,1,2,3,4,5,6,7,8,9,10,10,11,11,12,12,13,13,14,
 14,15,15,16,16,17,17,18,18,19,19,20,20,21,21,22,
 22,23,23,24,24,25,25,26,26,27,27,28,28,29,29,30,
 30,31,31,32,32,33,33,34,34,35,35,36,36,37,37,38,
 38,39,39,40,40,41]