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A037798 as a simple table

na(n)
13
229
3262
42358
521225
6191027
71719244
815473196
9139258767
101253328905
1111279960146
12101519641314
13913676771829
148223090946463
1574007818518168
16666070366663512
175994633299971611

[3,29,262,2358,21225,191027,1719244,15473196,
 139258767,1253328905,11279960146,101519641314,
 913676771829,8223090946463,74007818518168,
 666070366663512,5994633299971611]