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A234497 as a simple table

na(n)
1250
21834
31834
413464
517022
613464
799142
8158288
9158288
1099142
11728536
121483566
131856768
141483566
15728536
165368636
1713868952
1822124316
1922124316
2013868952
215368636
2239476802
23130537496
24260915944
25337787398
26260915944

[250,1834,1834,13464,17022,13464,99142,158288,
 158288,99142,728536,1483566,1856768,1483566,
 728536,5368636,13868952,22124316,22124316,
 13868952,5368636,39476802,130537496,260915944,
 337787398,260915944]