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A027555 as a simple table

na(n)
01
11
2-1
31
4-2
53
61
7-3
86
9-10
101
11-4
1210
13-20
1435
151
16-5
1715
18-35
1970
20-126
211
22-6
2321
24-56
25126
26-252
27462
281
29-7
3028
31-84
32210
33-462
34924
35-1716
361
37-8
3836
39-120
40330
41-792
421716
43-3432
446435
451
46-9
4745
48-165
49495
50-1287
513003
52-6435
5312870
54-24310
551
56-10
5755
58-220
59715
60-2002
615005
62-11440
6324310
64-48620
6592378

[1,1,-1,1,-2,3,1,-3,6,-10,1,-4,10,-20,35,1,-5,15,
 -35,70,-126,1,-6,21,-56,126,-252,462,1,-7,28,-84,
 210,-462,924,-1716,1,-8,36,-120,330,-792,1716,
 -3432,6435,1,-9,45,-165,495,-1287,3003,-6435,
 12870,-24310,1,-10,55,-220,715,-2002,5005,-11440,
 24310,-48620,92378]