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A190662 as a simple table

na(n)
115
221
385
4265
52761
610129
7111001
8887161
921047881
10210471241
111037836969
1268018232241
13361167207241
143312775065961
1549691625984361
161548286451713369
1716361621692416529
18294509190463488529

[15,21,85,265,2761,10129,111001,887161,21047881,
 210471241,1037836969,68018232241,361167207241,
 3312775065961,49691625984361,1548286451713369,
 16361621692416529,294509190463488529]