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A251812 as a simple table

na(n)
1345
2500
3738
41215
51973
63349
76066
811665
923442
1048256
11101531
12217705
13471123
141025656
152242011
164913306
1710789096
1823715353
1952156045
20114761543
21252589712
22556041339
231224184142
242695346588
255934782271
2613067996277
2728775310395

[345,500,738,1215,1973,3349,6066,11665,23442,
 48256,101531,217705,471123,1025656,2242011,
 4913306,10789096,23715353,52156045,114761543,
 252589712,556041339,1224184142,2695346588,
 5934782271,13067996277,28775310395]