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A212641 as a simple table

na(n)
11
23
31
45
53
69
77
83
91
1015
111
129
139
145
155
1621
173
1827
1911
203
2125
227
239
243
2527
2615
271
2845
2913
3015
3135
323
339
3427
359
367
3733
385
3915
405
4163
4221
4315
449
4545
469
471
4811
499
503
5175
521
5339
5425
5521
5681
5749
585
593
6081
6127
6245
6317
6421
6555
663
6727
687
693
7013
7145
7215
73105
749
7545

[1,3,1,5,3,9,7,3,1,15,1,9,9,5,5,21,3,27,11,3,25,7,
 9,3,27,15,1,45,13,15,35,3,9,27,9,7,33,5,15,5,63,
 21,15,9,45,9,1,11,9,3,75,1,39,25,21,81,49,5,3,81,
 27,45,17,21,55,3,27,7,3,13,45,15,105,9,45]