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A274600 as a simple table

n a(n)
0 1
1 -1
2 1
3 2
4 7
5 59
6 616
7 6992
8 90847
9 1352549
10 22591681
11 417527582
12 8465505412
13 186906393764
14 4463901355096
15 114672825810272
16 3153127461349327
17 92405864554182329
18 2875362251645606611
19 94680648376734042062
20 3289274269898822961967
21 120235993277078434540619

[1,-1,1,2,7,59,616,6992,90847,1352549,22591681,
 417527582,8465505412,186906393764,4463901355096,
 114672825810272,3153127461349327,
 92405864554182329,2875362251645606611,
 94680648376734042062,3289274269898822961967,
 120235993277078434540619]

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Last modified June 13 00:21 EDT 2024. Contains 373362 sequences. (Running on oeis4.)