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A211279 as a simple table

na(n)
01
13
27
315
433
581
6223
7651
81915
95559
1015921
1145333
12129309
13371025
141071411
153108951
169047853
1726374005
1876959295
19224790195
20657326803
211924486719
225641225341
2316554458025
2448627650779
25142963972275
26420635073625
271238489452437
283648942571185
2910757537699373
3031733207206191

[1,3,7,15,33,81,223,651,1915,5559,15921,45333,
 129309,371025,1071411,3108951,9047853,26374005,
 76959295,224790195,657326803,1924486719,
 5641225341,16554458025,48627650779,142963972275,
 420635073625,1238489452437,3648942571185,
 10757537699373,31733207206191]