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A291898 as a simple table

na(n)
01
1-3
29
3-21
49
5297
6-2421
712933
8-52407
9145293
10-35091
11-2954097
1225228971
13-142080669
14602217261
15-1724917221
16283305033
1738852066421
18-337425235479
191938308236731
20-8364863310291
2124286959061533
22-3011589296289
23-574023003011199
245028616107443691

[1,-3,9,-21,9,297,-2421,12933,-52407,145293,
 -35091,-2954097,25228971,-142080669,602217261,
 -1724917221,283305033,38852066421,-337425235479,
 1938308236731,-8364863310291,24286959061533,
 -3011589296289,-574023003011199,5028616107443691]