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A253611 as a simple table

na(n)
1762
28664
397232
41100582
512433311
6140520343
71587933587
817945023519
9202792213952
102291710610115
1125898101189643
12292668628900524
133307382282978585
1437375983213265800
15422377576820935092

[762,8664,97232,1100582,12433311,140520343,
 1587933587,17945023519,202792213952,2291710610115,
 25898101189643,292668628900524,3307382282978585,
 37375983213265800,422377576820935092]