login

A270307 as a simple table

na(n)
01
13
27
37
421
527
657
795
8169
9303
10529
11943
121665
132943
145217
159215
1616321
1728863
1851073
1990367
20159873
21282879
22500481
23885503
241566721
252771967
264904449
278677375
2815352833
2927163647
3048060417
3185032959
32150448129
33266186751
34470962177

[1,3,7,7,21,27,57,95,169,303,529,943,1665,2943,
 5217,9215,16321,28863,51073,90367,159873,282879,
 500481,885503,1566721,2771967,4904449,8677375,
 15352833,27163647,48060417,85032959,150448129,
 266186751,470962177]