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A250378 as a simple table

na(n)
1714
239471
3584904
44530981
523761098
695876627
7320301600
8927689769
92402475802
105685632535
1112493324680
1225797289869
1350524534074
1494547403963
15170050397312
16295377297873
17497481476778
18815123592319
191302984547464

[714,39471,584904,4530981,23761098,95876627,
 320301600,927689769,2402475802,5685632535,
 12493324680,25797289869,50524534074,94547403963,
 170050397312,295377297873,497481476778,
 815123592319,1302984547464]