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A303351 as a simple table

n a(n)
0 1
1 3
2 -6
3 57
4 -294
5 1884
6 -13011
7 95178
8 -712293
9 5448495
10 -42444375
11 335392941
12 -2681006280
13 21639853488
14 -176113016241
15 1443450932445
16 -11903668996713
17 98695838478585
18 -822212761531101
19 6878755556938029
20 -57767592614370576
21 486792969548157129

[1,3,-6,57,-294,1884,-13011,95178,-712293,5448495,
 -42444375,335392941,-2681006280,21639853488,
 -176113016241,1443450932445,-11903668996713,
 98695838478585,-822212761531101,6878755556938029,
 -57767592614370576,486792969548157129]

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Last modified December 11 18:34 EST 2019. Contains 329925 sequences. (Running on oeis4.)