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A013331 as a simple table

na(n)
00
11
20
3-1
4-4
55
660
7-61
8-2504
9-8695
10100920
11873479
12-6889804
13-142058995
14-4843020
1519728547019
1698903242096
17-3531831462895
18-49401992303760
19493517141932559
2017048746833049196
21-29344831492412395
22-6329111550017193300
23-46994369824929657901
242170046335781374467496

[0,1,0,-1,-4,5,60,-61,-2504,-8695,100920,873479,
 -6889804,-142058995,-4843020,19728547019,
 98903242096,-3531831462895,-49401992303760,
 493517141932559,17048746833049196,
 -29344831492412395,-6329111550017193300,
 -46994369824929657901,2170046335781374467496]