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A197042 as a simple table

na(n)
12
220
3120
4698
54080
624074
7141856
8833758
94909544
1028899922
11170120402
121001361542
135894102732
1434694985108
15204224876622
161202124327402
177076038423114
1841651567268298
19245173129915012
201443158678807678

[2,20,120,698,4080,24074,141856,833758,4909544,
 28899922,170120402,1001361542,5894102732,
 34694985108,204224876622,1202124327402,
 7076038423114,41651567268298,245173129915012,
 1443158678807678]