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A356256 as a simple table

na(n)
03
15
217
371
4227
5821
62087
75021
813757
933149
1081197
11186647
12435401
131002719
142241779
155060171
1611296421
1725121207
1855559507
19121831601
20266187827
21578653919
221253242691
232705496551
245820833729
2512491149637
2626733605159
2757077657321
28121575837179
29258438193379

[3,5,17,71,227,821,2087,5021,13757,33149,81197,
 186647,435401,1002719,2241779,5060171,11296421,
 25121207,55559507,121831601,266187827,578653919,
 1253242691,2705496551,5820833729,12491149637,
 26733605159,57077657321,121575837179,258438193379]