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A253035 as a simple table

na(n)
1297
21647
31647
49126
512987
69126
750571
8102060
9102060
1050571
11280233
12802899
131134864
14802899
15280233
161552878
176320511
1812647772
1912647772
206320511
211552878
228605089
2349756086
24141199416
25199953846
26141199416
2749756086
288605089

[297,1647,1647,9126,12987,9126,50571,102060,
 102060,50571,280233,802899,1134864,802899,280233,
 1552878,6320511,12647772,12647772,6320511,1552878,
 8605089,49756086,141199416,199953846,141199416,
 49756086,8605089]