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A366221 as a simple table

na(n)
01
11
25
325
4145
5905
65941
740433
8282721
92018897
1014661349
11107945993
12803922289
136045458905
1445840518933
15350100674785
162690717983169
1720794719218593
18161502488175557
191259855507859193
209867012143508305
2177554946281194793
22611575725258403061

[1,1,5,25,145,905,5941,40433,282721,2018897,
 14661349,107945993,803922289,6045458905,
 45840518933,350100674785,2690717983169,
 20794719218593,161502488175557,1259855507859193,
 9867012143508305,77554946281194793,
 611575725258403061]