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A022720 as a simple table

n a(n)
0 1
1 -28
2 350
3 -2576
4 12593
5 -45892
6 149926
7 -514504
8 1734264
9 -5142508
10 14199108
11 -40931240
12 117876241
13 -311946824
14 796757922
15 -2104447072
16 5482534827
17 -13518654268
18 32992345904
19 -81755033080
20 198688497651

[1,-28,350,-2576,12593,-45892,149926,-514504,
 1734264,-5142508,14199108,-40931240,117876241,
 -311946824,796757922,-2104447072,5482534827,
 -13518654268,32992345904,-81755033080,
 198688497651]

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Last modified June 26 10:23 EDT 2022. Contains 354879 sequences. (Running on oeis4.)