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A325654 as a simple table

na(n)
16
228
3496
48128
560480
665520
74357080
833550336
947139840
1091065600
11285981696
122758909440
138589869056
1487722956800
15132867440640
16137438691328
17306007080960
18806062473216
191409150457792
20363485766938112
2112177456042320640
2229884246553283840

[6,28,496,8128,60480,65520,4357080,33550336,
 47139840,91065600,285981696,2758909440,8589869056,
 87722956800,132867440640,137438691328,
 306007080960,806062473216,1409150457792,
 363485766938112,12177456042320640,
 29884246553283840]