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A174297 as a simple table

n a(n)
1 1
2 -1
3 -1
4 0
5 -1
6 1
7 -3
8 6
9 -15
10 36
11 -91
12 232
13 -603
14 1585
15 -4213
16 11298
17 -30537
18 83097
19 -227475
20 625992
21 -1730787
22 4805595
23 -13393689
24 37458330
25 -105089229
26 295673994
27 -834086421
28 2358641376
29 -6684761125
30 18985057351
31 -54022715451

[1,-1,-1,0,-1,1,-3,6,-15,36,-91,232,-603,1585,
 -4213,11298,-30537,83097,-227475,625992,-1730787,
 4805595,-13393689,37458330,-105089229,295673994,
 -834086421,2358641376,-6684761125,18985057351,
 -54022715451]

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Last modified June 21 06:11 EDT 2021. Contains 345358 sequences. (Running on oeis4.)