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A078630 as a simple table

n a(n)
0 1
1 -4
2 0
3 20
4 58
5 796
6 7858
7 40324
8 140194
9 2444744
10 40680494
11 -7117319032
12 -149539443124
13 -223750776484
14 -4960419494993024
15 -46146161037854692
16 -689434674121075448
17 -132496988938839119444
18 -9686633414582239854958
19 -442788087926096759821484

[1,-4,0,20,58,796,7858,40324,140194,2444744,
 40680494,-7117319032,-149539443124,-223750776484,
 -4960419494993024,-46146161037854692,
 -689434674121075448,-132496988938839119444,
 -9686633414582239854958,-442788087926096759821484]

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Last modified August 4 16:34 EDT 2020. Contains 336202 sequences. (Running on oeis4.)