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A319824 as a simple table

na(n)
12
23
34
45
56
69
710
811
912
1013
1114
1215
1316
1417
1518
1619
1720
1823
1924
2025
2126
2227
2330
2433
2534
2635
2736
2837
2940
3041
3142
3243
3344
3445
3546
3647
3748
3851
3954
4055
4158
4261
4362
4465
4566
4667
4768
4869
4972
5073
5174
5275
5376
5479
5582
5683
5786
5889
5990
6093
6196
6297
6398
6499
65100
66103

[2,3,4,5,6,9,10,11,12,13,14,15,16,17,18,19,20,23,
 24,25,26,27,30,33,34,35,36,37,40,41,42,43,44,45,
 46,47,48,51,54,55,58,61,62,65,66,67,68,69,72,73,
 74,75,76,79,82,83,86,89,90,93,96,97,98,99,100,103]