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A002771 as a simple table

na(n)
11
22
34
413
541
6226
71072
89374
960958
10723916
115892536
1286402812
13837641884
1414512333928
15162925851376
163252104882056
1741477207604872
18937014810365584
1913380460644770848
20337457467862898896
215333575373478669136
22148532521250931168352

[1,2,4,13,41,226,1072,9374,60958,723916,5892536,
 86402812,837641884,14512333928,162925851376,
 3252104882056,41477207604872,937014810365584,
 13380460644770848,337457467862898896,
 5333575373478669136,148532521250931168352]