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A128640 as a simple table

n a(n)
1 1
2 -4
3 10
4 -20
5 39
6 -76
7 140
8 -244
9 415
10 -696
11 1140
12 -1820
13 2861
14 -4448
15 6816
16 -10292
17 15372
18 -22756
19 33356
20 -48408
21 69683
22 -99600
23 141312
24 -199036
25 278557
26 -387608
27 536230
28 -737632
29 1009464
30 -1374888
31 1863764
32 -2514868
33 3378948
34 -4521672
35 6027000
36 -8002676

[1,-4,10,-20,39,-76,140,-244,415,-696,1140,-1820,
 2861,-4448,6816,-10292,15372,-22756,33356,-48408,
 69683,-99600,141312,-199036,278557,-387608,536230,
 -737632,1009464,-1374888,1863764,-2514868,3378948,
 -4521672,6027000,-8002676]

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Last modified August 17 02:18 EDT 2024. Contains 375198 sequences. (Running on oeis4.)