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A247903 as a simple table

na(n)
01
15
213
329
453
593
6149
7237
8357
9541
10789
111165
121669
132429
143445
154973
167013
1710077
1814165
1920301
2028485
2140765
2257141
2381709
24114469
25163613
26229141
27327437
28458501
29655101
30917237
311310445
321834725
332621149
343669717
355242573
367339717
3710485437

[1,5,13,29,53,93,149,237,357,541,789,1165,1669,
 2429,3445,4973,7013,10077,14165,20301,28485,40765,
 57141,81709,114469,163613,229141,327437,458501,
 655101,917237,1310445,1834725,2621149,3669717,
 5242573,7339717,10485437]