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A261893 as a simple table

na(n)
01
17
223
355
4109
5191
6307
7463
8665
9919
101231
111607
122053
132575
143179
153871
164657
175543
186535
197639
208861
2110207
2211683
2313295
2415049
2516951
2619007
2721223
2823605
2926159
3028891
3131807
3234913
3338215
3441719
3545431
3649357
3753503
3857875
3962479
4067321
4172407

[1,7,23,55,109,191,307,463,665,919,1231,1607,2053,
 2575,3179,3871,4657,5543,6535,7639,8861,10207,
 11683,13295,15049,16951,19007,21223,23605,26159,
 28891,31807,34913,38215,41719,45431,49357,53503,
 57875,62479,67321,72407]