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A045720 as a simple table

na(n)
01
19
257
3312
41578
57599
635401
7161052
8719790
93173090
1013836426
1159803104
12256596276
131094249019
144642178601
1519605872724
1682483419846
17345839048094
181445715336366
196027524015664
2025070662980876
21104056307673654

[1,9,57,312,1578,7599,35401,161052,719790,3173090,
 13836426,59803104,256596276,1094249019,4642178601,
 19605872724,82483419846,345839048094,
 1445715336366,6027524015664,25070662980876,
 104056307673654]