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A278080 as a simple table

na(n)
00
10
21
3-5
4126
51490
6118151
78256885
8808428076
9100199284180
1015432169163901
112889536106161375
12646438926423519626
13170294687860735726470
1452177485058722877649251
1518397662218707151323777465
167396641315814156362154666776

[0,0,1,-5,126,1490,118151,8256885,808428076,
 100199284180,15432169163901,2889536106161375,
 646438926423519626,170294687860735726470,
 52177485058722877649251,
 18397662218707151323777465,
 7396641315814156362154666776]