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A175542 as a simple table

na(n)
11
22
31
44
52
66
71
88
94
1010
115
1212
136
1414
151
1616
178
1818
199
2020
2110
2222
233
2424
2512
2626
2713
2828
2914
3030
311
3232
3316
3434
3517
3636
3718
3838
3919
4040
4120
4242
4321
4444
4522
4646
4723
4848
4924
5050
5125
5252
5326
5454
5527
5656
5728
5858
5929
6060
6130
6262
631
6464
6532
6666
6733
6868
6934
7070
7135
7272
7336
7474
7537
7676

[1,2,1,4,2,6,1,8,4,10,5,12,6,14,1,16,8,18,9,20,10,
 22,3,24,12,26,13,28,14,30,1,32,16,34,17,36,18,38,
 19,40,20,42,21,44,22,46,23,48,24,50,25,52,26,54,
 27,56,28,58,29,60,30,62,1,64,32,66,33,68,34,70,35,
 72,36,74,37,76]