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A027688 as a simple table

na(n)
03
15
29
315
423
533
645
759
875
993
10113
11135
12159
13185
14213
15243
16275
17309
18345
19383
20423
21465
22509
23555
24603
25653
26705
27759
28815
29873
30933
31995
321059
331125
341193
351263
361335
371409
381485
391563
401643
411725
421809
431895
441983
452073
462165
472259
482355
492453
502553
512655

[3,5,9,15,23,33,45,59,75,93,113,135,159,185,213,
 243,275,309,345,383,423,465,509,555,603,653,705,
 759,815,873,933,995,1059,1125,1193,1263,1335,1409,
 1485,1563,1643,1725,1809,1895,1983,2073,2165,2259,
 2355,2453,2553,2655]