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A254457 as a simple table

na(n)
1512
23036
33036
416240
526380
616240
776832
8196684
9196684
1076832
11348032
121279568
132085712
141279568
15348032
161511152
178004340
1819716320
1919716320
208004340
211511152
226440848
2348345120
24180449544
25275772848
26180449544
2748345120

[512,3036,3036,16240,26380,16240,76832,196684,
 196684,76832,348032,1279568,2085712,1279568,
 348032,1511152,8004340,19716320,19716320,8004340,
 1511152,6440848,48345120,180449544,275772848,
 180449544,48345120]