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A071591 as a simple table

na(n)
11
22
33
45
56
67
710
811
912
1013
1114
1215
1316
1417
1519
1620
1722
1824
1926
2028
2130
2231
2332
2433
2534
2635
2737
2838
2939
3041
3143
3247
3349
3450
3551
3653
3755
3856
3958
4059
4160
4262
4364
4466
4568
4670
4771
4873
4974
5075
5176
5277
5378
5479
5583
5685
5787
5891
5992
6093
6195
6296
6397
6498
65100
66101
67102
68103
69104

[1,2,3,5,6,7,10,11,12,13,14,15,16,17,19,20,22,24,
 26,28,30,31,32,33,34,35,37,38,39,41,43,47,49,50,
 51,53,55,56,58,59,60,62,64,66,68,70,71,73,74,75,
 76,77,78,79,83,85,87,91,92,93,95,96,97,98,100,101,
 102,103,104]