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A111641 as a simple table

n a(n)
0 1
1 -5
2 25
3 -107
4 433
5 -1697
6 6529
7 -24839
8 93841
9 -352973
10 1323961
11 -4957139
12 18539041
13 -69282185
14 258790465
15 -966364367
16 3607837153
17 -13467809237
18 50270219929
19 -187629535739
20 700287673681
21 -2613617125553
22 9754412512321
23 -36404592257879
24 135865306871281

[1,-5,25,-107,433,-1697,6529,-24839,93841,-352973,
 1323961,-4957139,18539041,-69282185,258790465,
 -966364367,3607837153,-13467809237,50270219929,
 -187629535739,700287673681,-2613617125553,
 9754412512321,-36404592257879,135865306871281]

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Last modified May 14 06:35 EDT 2021. Contains 343879 sequences. (Running on oeis4.)