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A072497 as a simple table

na(n)
12
23
34
45
56
67
79
810
911
1013
1114
1215
1316
1417
1518
1619
1720
1821
1922
2023
2124
2225
2326
2428
2529
2630
2731
2833
2934
3035
3136
3237
3338
3439
3540
3641
3742
3843
3944
4046
4147
4248
4349
4450
4551
4652
4753
4854
4955
5056
5157
5258
5359
5460
5561
5662
5764
5865
5966
6067
6168
6269
6370
6471
6572
6673
6774
6875
6976
7077
7178

[2,3,4,5,6,7,9,10,11,13,14,15,16,17,18,19,20,21,
 22,23,24,25,26,28,29,30,31,33,34,35,36,37,38,39,
 40,41,42,43,44,46,47,48,49,50,51,52,53,54,55,56,
 57,58,59,60,61,62,64,65,66,67,68,69,70,71,72,73,
 74,75,76,77,78]