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A258689 as a simple table

na(n)
141728
2386304
3386304
43512272
55392960
63512272
727566112
858713912
958713912
1027566112
11202381312
12479373352
13730627431
14479373352
15202381312
161439941888
174020536064
185979059398
195979059398
204020536064
211439941888
229687764256

[41728,386304,386304,3512272,5392960,3512272,
 27566112,58713912,58713912,27566112,202381312,
 479373352,730627431,479373352,202381312,
 1439941888,4020536064,5979059398,5979059398,
 4020536064,1439941888,9687764256]