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A007324 as a simple table

na(n)
19
2561
31729
41729
5399001
6399001
71857241
81857241
96189121
1014469841
1114469841
1214469841

[9,561,1729,1729,399001,399001,1857241,1857241,
 6189121,14469841,14469841,14469841]