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A307855 as a simple table

na(n)
01
11
21
31
41
51
61
71
83
91
101
111
125
137
141
151
161
177
1813
1919
201
211
221
239
2419
2549
2651
271
281
291
3011
3125
3291
33161
34141
351
361
371
3813
3931
40145
41331
42581
43393
441
451
461
4715
4837
49211
50561
511441
522045
531107
541
551
561
5717
5843
59289
60851
612841
625797
637393
643139
651

[1,1,1,1,1,1,1,1,3,1,1,1,5,7,1,1,1,7,13,19,1,1,1,
 9,19,49,51,1,1,1,11,25,91,161,141,1,1,1,13,31,145,
 331,581,393,1,1,1,15,37,211,561,1441,2045,1107,1,
 1,1,17,43,289,851,2841,5797,7393,3139,1]