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A253871 as a simple table

na(n)
1512
23328
33328
420480
531632
620480
7119040
8288000
9296960
10119040
11679936
122546432
133939840
142589968
15679936
163825920
1722201600
1852394496
1950414592
2022729728
213825920
2221426176
23192159408
24677982208
251052857184
26659280384

[512,3328,3328,20480,31632,20480,119040,288000,
 296960,119040,679936,2546432,3939840,2589968,
 679936,3825920,22201600,52394496,50414592,
 22729728,3825920,21426176,192159408,677982208,
 1052857184,659280384]