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A291377 as a simple table

na(n)
11
20
31
40
52
6-1
75
8-7
915
10-35
1157
12-155
13262
14-664
151297
16-2910
176437
18-13428
1931461
20-65137
21152576
22-325838
23744223
24-1649943
253685869
26-8376976
2718574146
28-42579093
2994912298
30-217177891
31489321856
32-1114542791
332535640016
34-5761630456
3513184657747
36-29989008137

[1,0,1,0,2,-1,5,-7,15,-35,57,-155,262,-664,1297,
 -2910,6437,-13428,31461,-65137,152576,-325838,
 744223,-1649943,3685869,-8376976,18574146,
 -42579093,94912298,-217177891,489321856,
 -1114542791,2535640016,-5761630456,13184657747,
 -29989008137]