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A170884 as a simple table

na(n)
00
13
27
315
427
539
651
767
899
9155
10223
11263
12283
13299
14331
15387
16467
17555
18659
19811
201067
211443
221831
231995
242059
252083
262123
272179
282259
292347
302451
312603
322859
333235
343659
353955
364211
374483
384899
395451

[0,3,7,15,27,39,51,67,99,155,223,263,283,299,331,
 387,467,555,659,811,1067,1443,1831,1995,2059,2083,
 2123,2179,2259,2347,2451,2603,2859,3235,3659,3955,
 4211,4483,4899,5451]