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A272411 as a simple table

na(n)
11
21
3-1
42
5-6
616
7-48
8155
9-506
101706
11-5888
1220608
13-73152
14262672
15-951929
163478158
17-12798568
1847384216
19-176387016
20659776638
21-2478574412
229347514586
23-35376839998
24134317287748
25-511463365764
261952816800973
27-7474463834606
2828673987914262
29-110233267218581
30424608422717362
31-1638541384230970
326333831090142919
33-24522697340016084
3495086658516947002

[1,1,-1,2,-6,16,-48,155,-506,1706,-5888,20608,
 -73152,262672,-951929,3478158,-12798568,47384216,
 -176387016,659776638,-2478574412,9347514586,
 -35376839998,134317287748,-511463365764,
 1952816800973,-7474463834606,28673987914262,
 -110233267218581,424608422717362,
 -1638541384230970,6333831090142919,
 -24522697340016084,95086658516947002]