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A197676 as a simple table

na(n)
19
273
3721
45639
545162
6358209
72871646
822955155
9183536379
101469158622
1111763937411
1294210675699
13754505710941
146042768236882
1548396947691377
16387618351751497
173104512821455985
1824864750644129585
19199147883255433840

[9,73,721,5639,45162,358209,2871646,22955155,
 183536379,1469158622,11763937411,94210675699,
 754505710941,6042768236882,48396947691377,
 387618351751497,3104512821455985,
 24864750644129585,199147883255433840]