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A124646 as a simple table

n a(n)
1 -1
2 -2
3 -10
4 -37
5 -143
6 -478
7 -1588
8 -4910
9 -14748
10 -42235
11 -116910
12 -311478
13 -803343
14 -2004434
15 -4853669
16 -11414943
17 -26127222
18 -58267164
19 -126811068
20 -269647980
21 -560935635
22 -1142812869
23 -2282784640
24 -4475122564

[-1,-2,-10,-37,-143,-478,-1588,-4910,-14748,
 -42235,-116910,-311478,-803343,-2004434,-4853669,
 -11414943,-26127222,-58267164,-126811068,
 -269647980,-560935635,-1142812869,-2282784640,
 -4475122564]

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Last modified September 26 12:57 EDT 2021. Contains 347666 sequences. (Running on oeis4.)