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A166135 as a simple table

na(n)
11
21
33
47
522
665
7213
8693
92352
108034
1128014
1298505
13350548
141256827
154542395
1616517631
1760417708
18222087320
19820099720
203040555978
2111314532376
2242243332130
23158196980682
24594075563613
252236627194858
268440468925400

[1,1,3,7,22,65,213,693,2352,8034,28014,98505,
 350548,1256827,4542395,16517631,60417708,
 222087320,820099720,3040555978,11314532376,
 42243332130,158196980682,594075563613,
 2236627194858,8440468925400]