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A275987 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
116
1212
1313
1414
1514
1616
1710
1818
1919
2020
2121
2222
2314
2424
2516
2620
2727
2828
2929
3030
3121
3232
3333
3434
3533
3636
3737
3824
3928
4040
4120
4242
4343
4444
4545
4630
4733
4848
4949
5050
5130
5252
5334
5454
5530
5654
5757
5840
5924
6060
6161
6242
6363
6464
6544
6666
6767
6868
6942
7066
7130
7272
7373
7474
7548

[1,2,3,4,5,6,7,8,9,10,6,12,13,14,14,16,10,18,19,
 20,21,22,14,24,16,20,27,28,29,30,21,32,33,34,33,
 36,37,24,28,40,20,42,43,44,45,30,33,48,49,50,30,
 52,34,54,30,54,57,40,24,60,61,42,63,64,44,66,67,
 68,42,66,30,72,73,74,48]