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A120266 as a simple table

na(n)
12
25
313
4103
51097
61223
747273
8556403
910661993
107281587
1162929017101
127218065
1360718862681977
14595953719897
1513324966405463
16247016301114823
1728505097599389815853
18549689343118061
19320305944459287485595917

[2,5,13,103,1097,1223,47273,556403,10661993,
 7281587,62929017101,7218065,60718862681977,
 595953719897,13324966405463,247016301114823,
 28505097599389815853,549689343118061,
 320305944459287485595917]