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A286472 as a simple table

na(n)
11
22
32
44
52
66
72
88
96
1011
112
1212
132
1415
1510
1616
172
1818
192
2020
2115
2223
232
2424
2510
2627
2718
2828
292
3030
312
3232
3323
3435
3514
3636
372
3839
3927
4040
412
4242
432
4444
4530
4647
472
4848
4914
5051
5135
5252
532
5454
5523
5656
5739
5859
592
6060
612
6263
6342
6464
6527
6666
672
6868
6947
7071
712
7272
732
7475
7550
7676
7722
7878
792

[1,2,2,4,2,6,2,8,6,11,2,12,2,15,10,16,2,18,2,20,
 15,23,2,24,10,27,18,28,2,30,2,32,23,35,14,36,2,39,
 27,40,2,42,2,44,30,47,2,48,14,51,35,52,2,54,23,56,
 39,59,2,60,2,63,42,64,27,66,2,68,47,71,2,72,2,75,
 50,76,22,78,2]