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A091516 as a simple table

na(n)
17
247
3223
43967
516127
61046527
716769023
81073676287
968718952447
10274876858367
114398042316799
121125899839733759
1318014398241046527
141298074214633706835075030044377087

[7,47,223,3967,16127,1046527,16769023,1073676287,
 68718952447,274876858367,4398042316799,
 1125899839733759,18014398241046527,
 1298074214633706835075030044377087]