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A054890 as a simple table

na(n)
11
27
342
4245
51428
68323
748510
8282737
91647912
109604735
1155980498
12326278253
131901689020
1411083855867
1564601446182
16376524821225
172194547481168
1812790760065783
1974550012913530
20434509317415397

[1,7,42,245,1428,8323,48510,282737,1647912,
 9604735,55980498,326278253,1901689020,11083855867,
 64601446182,376524821225,2194547481168,
 12790760065783,74550012913530,434509317415397]