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A046561 as a simple table

na(n)
11
23
37
45
525
613
755
831
919
10203
1149
1273
1395
14105
15295
16145
17737
18583
19179
201683
211177
221903
2371
2437
253575
262665
27325
286435
298099
301225
3143
3213585
3333319
347371
353913
364865
37505
38111
39379
402227
413485
42885
4313889
441045
45535
4648773
4718259
485415
49593
5061

[1,3,7,5,25,13,55,31,19,203,49,73,95,105,295,145,
 737,583,179,1683,1177,1903,71,37,3575,2665,325,
 6435,8099,1225,43,13585,33319,7371,3913,4865,505,
 111,379,2227,3485,885,13889,1045,535,48773,18259,
 5415,593,61]