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A009497 as a simple table

na(n)
01
1-64
225216
3-31711744
493380755456
5-538721831747584
65434440423098023936
7-88353705160970793385984
82179843711161864280506105856
9-77903078128153520290915516678144

[1,-64,25216,-31711744,93380755456,
 -538721831747584,5434440423098023936,
 -88353705160970793385984,
 2179843711161864280506105856,
 -77903078128153520290915516678144]