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A308969 as a simple table

na(n)
11
23
311
45
5137
67
73
811
9761
107129
1111
1261
1397
14863
1513
16509
1729
1843
19919
201049
211117
2229
2341233
2417
258431
2637
271138979
2819
2939541
3037
317440427
325
3311167027
3418858053
353
3623
3753
38227
39761
40583859
415
42577
43467183
44109
45312408463

[1,3,11,5,137,7,3,11,761,7129,11,61,97,863,13,509,
 29,43,919,1049,1117,29,41233,17,8431,37,1138979,
 19,39541,37,7440427,5,11167027,18858053,3,23,53,
 227,761,583859,5,577,467183,109,312408463]