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A157396 as a simple table

na(n)
11
21
36
41
518
666
71
8144
9264
101056
111
12600
134620
145280
1522176
161
174950
1868640
19110880
20133056
21576576
221
2326586
24639870
253141600
263259872
274036032
2817873856
291
30234528
3110759056
3269263040
33105557760
34113008896
35142990848

[1,1,6,1,18,66,1,144,264,1056,1,600,4620,5280,
 22176,1,4950,68640,110880,133056,576576,1,26586,
 639870,3141600,3259872,4036032,17873856,1,234528,
 10759056,69263040,105557760,113008896,142990848]