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A102264 as a simple table

na(n)
15
217
341
4257
5521
64481
79521
821929
972089
10531977
111256009
125014169
1320879129
1470993529
15258844361
16866941841
173771185921

[5,17,41,257,521,4481,9521,21929,72089,531977,
 1256009,5014169,20879129,70993529,258844361,
 866941841,3771185921]