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A308847 as a simple table

na(n)
01
1-2
22
34
4-14
5-52
6284
71496
8-10958
9-74372
10681652
115656616
12-62226116
13-610306712
147832965352
1588645228304
16-1300254163918
17-16676932459172
18275196007522436
193944890321174664
20-72330003541955564
21-1145979961718846152
2223112838345877865752
23401070175407076000624
24-8824400094691629670724

[1,-2,2,4,-14,-52,284,1496,-10958,-74372,681652,
 5656616,-62226116,-610306712,7832965352,
 88645228304,-1300254163918,-16676932459172,
 275196007522436,3944890321174664,
 -72330003541955564,-1145979961718846152,
 23112838345877865752,401070175407076000624,
 -8824400094691629670724]