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A020933 as a simple table

n a(n)
0 1
1 -42
2 798
3 -9044
4 67830
5 -352716
6 1293292
7 -3325608
8 5819814
9 -6466460
10 3879876
11 -705432
12 -117572
13 -54264
14 -38760
15 -36176
16 -40698
17 -52668
18 -76076
19 -120120
20 -204204
21 -369512
22 -705432
23 -1410864
24 -2939300
25 -6348888
26 -14162904
27 -32522224
28 -76659528
29 -185040240

[1,-42,798,-9044,67830,-352716,1293292,-3325608,
 5819814,-6466460,3879876,-705432,-117572,-54264,
 -38760,-36176,-40698,-52668,-76076,-120120,
 -204204,-369512,-705432,-1410864,-2939300,
 -6348888,-14162904,-32522224,-76659528,-185040240]

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)