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A144471 as a simple table

na(n)
01
13
2-5
313
4-30
561
6-119
7234
8-467
9937
10-1878
113757
12-7511
1315018
14-30035
1560073
16-120150
17240301
18-480599
19961194
20-1922387
213844777
22-7689558
2315379117
24-30758231
2561516458
26-123032915
27246065833
28-492131670
29984263341
30-1968526679
313937053354
32-7874106707

[1,3,-5,13,-30,61,-119,234,-467,937,-1878,3757,
 -7511,15018,-30035,60073,-120150,240301,-480599,
 961194,-1922387,3844777,-7689558,15379117,
 -30758231,61516458,-123032915,246065833,
 -492131670,984263341,-1968526679,3937053354,
 -7874106707]