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A180238 as a simple table

na(n)
01
13
29
327
475
5189
6447
7951
81911
93621
106513
1111103
1218267
1329013
1444691
1567251
1698547
17140865
18197679
19272799
20370659
21497403
22658371
23859863
241110453
251420527
261799373
272260161
282815401
293479235
304269279

[1,3,9,27,75,189,447,951,1911,3621,6513,11103,
 18267,29013,44691,67251,98547,140865,197679,
 272799,370659,497403,658371,859863,1110453,
 1420527,1799373,2260161,2815401,3479235,4269279]