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A023580 as a simple table

na(n)
15
25
32
47
59
62
77
813
915
102
1119
127
1313
1425
157
169
1733
182
1914
2039
2121
2243
2345
2425
257
2615
2755
2818
299
3031
3120
3269
3314
3473
3521
3620
377
3885
3924
4013
4122
4225
4399
449
457
46103
47109
48115
4930
5031
5161
5213
5363
54129
5520
5628
5719
58139
5914
6073
6126
6239
6338
64159
6581
667
67169
6824
6914

[5,5,2,7,9,2,7,13,15,2,19,7,13,25,7,9,33,2,14,39,
 21,43,45,25,7,15,55,18,9,31,20,69,14,73,21,20,7,
 85,24,13,22,25,99,9,7,103,109,115,30,31,61,13,63,
 129,20,28,19,139,14,73,26,39,38,159,81,7,169,24,
 14]