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A221616 as a simple table

na(n)
13
226
313
42
521
616
78
814
96
1018
115
1212
1310
1411
159
1620
174
1823
1919
2025
211
2227
2322
2417
257
2615
2724

[3,26,13,2,21,16,8,14,6,18,5,12,10,11,9,20,4,23,
 19,25,1,27,22,17,7,15,24]