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A254101 as a simple table

na(n)
11
23
31
41
51
65
73
811
923
107
117
1217
131
1417
1541
169
175
1825
1995
20203
2161
225
2313
2459
25149
2671
2719
28365
293
3029
3177
3211
33223
34851
351823
36547
3713
3835
3943
40115
41527
421337
43319
441367
453281
4615
4719
4813
49257
50689
51395
522005
537655
5416403
554921
561
5711
58113
59311
60385
611033
624739
6312029
645741
656151
6629525

[1,3,1,1,1,5,3,11,23,7,7,17,1,17,41,9,5,25,95,203,
 61,5,13,59,149,71,19,365,3,29,77,11,223,851,1823,
 547,13,35,43,115,527,1337,319,1367,3281,15,19,13,
 257,689,395,2005,7655,16403,4921,1,11,113,311,385,
 1033,4739,12029,5741,6151,29525]