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A068388 as a simple table

na(n)
11
25
39
49
547
654
7171
8867
93056
1028687
11133134
12542005
13563497
141046686
151955619
162057281
1742760619
18661780137
191109113993
206460565976
218523453296
2234406061218
2364402180149
241607033374515
2510943963720662
26124655149151970

[1,5,9,9,47,54,171,867,3056,28687,133134,542005,
 563497,1046686,1955619,2057281,42760619,661780137,
 1109113993,6460565976,8523453296,34406061218,
 64402180149,1607033374515,10943963720662,
 124655149151970]