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A156314 as a simple table

na(n)
02
15
223
347
4283
5557
65147
72273
812899
9103703
10146417
113369869
125037233
1371067323
146484133

[2,5,23,47,283,557,5147,2273,12899,103703,146417,
 3369869,5037233,71067323,6484133]