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A261325 as a simple table

na(n)
01
1-3
28
3-18
438
5-75
6140
7-252
8439
9-744
101232
11-1998
123182
13-4986
147700
15-11736
1617673
17-26322
1838808
19-56682
2082070
21-117867
22167996
23-237744
24334202
25-466836
26648224
27-895014
281229148
29-1679436
302283568
31-3090672
324164578
33-5587941
347467464
35-9940482

[1,-3,8,-18,38,-75,140,-252,439,-744,1232,-1998,
 3182,-4986,7700,-11736,17673,-26322,38808,-56682,
 82070,-117867,167996,-237744,334202,-466836,
 648224,-895014,1229148,-1679436,2283568,-3090672,
 4164578,-5587941,7467464,-9940482]