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A273388 as a simple table

na(n)
01
15
29
321
421
545
633
781
849
9109
1073
11181
12105
13241
1489
15297
16181
17401
18137
19449
20289
21585
22229
23637
24381
25821
26305
27893
28477
291089
30361
311201
32569
331445
34457
351561
36701
371825
38549
391929
40817
412225
42657
432357
44965
452685
46765
472805
481097
493165
50889
513313

[1,5,9,21,21,45,33,81,49,109,73,181,105,241,89,
 297,181,401,137,449,289,585,229,637,381,821,305,
 893,477,1089,361,1201,569,1445,457,1561,701,1825,
 549,1929,817,2225,657,2357,965,2685,765,2805,1097,
 3165,889,3313]