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A128378 as a simple table

na(n)
11
20
3-24
4-24
5252
6552
7-1196
8-5496
9-1218
1027808
1150532
12-44136
13-286534
14-305256
15551724
162023976
171639485
18-3659784
19-11484752
20-9396720
2116258722
2255073200
2355004040
24-44731872
25-220443155
26-289179552
275590128
28691963304
291254552228
30741227832
31-1414045956

[1,0,-24,-24,252,552,-1196,-5496,-1218,27808,
 50532,-44136,-286534,-305256,551724,2023976,
 1639485,-3659784,-11484752,-9396720,16258722,
 55073200,55004040,-44731872,-220443155,-289179552,
 5590128,691963304,1254552228,741227832,
 -1414045956]