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A057398 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 -3
5 0
6 -18
7 -12
8 -87
9 -120
10 -432
11 -840
12 -2883
13 -5208
14 -21378
15 -39876
16 -144507
17 -309456
18 -978888
19 -2349828
20 -6995931
21 -17727576
22 -52099902
23 -133195908
24 -389599548
25 -1010029956
26 -2921670744
27 -7740553548

[1,0,0,0,-3,0,-18,-12,-87,-120,-432,-840,-2883,
 -5208,-21378,-39876,-144507,-309456,-978888,
 -2349828,-6995931,-17727576,-52099902,-133195908,
 -389599548,-1010029956,-2921670744,-7740553548]

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Last modified May 28 14:47 EDT 2020. Contains 334684 sequences. (Running on oeis4.)