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A223851 as a simple table

na(n)
12
24
3-10
4-116
5-538
6-1316
73110
868044
9593702
104117564
1125598630
12149298604
13835538342
144545417244
1524232768550
16127291207564
17661279993382
183406640457724
1917437000616870
2088808710210924
21450563930438822
222278977841239004
2311499752014647590

[2,4,-10,-116,-538,-1316,3110,68044,593702,
 4117564,25598630,149298604,835538342,4545417244,
 24232768550,127291207564,661279993382,
 3406640457724,17437000616870,88808710210924,
 450563930438822,2278977841239004,
 11499752014647590]