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A129395 as a simple table

na(n)
00
14
2-14
332
46
5-220
6794
7-1528
81038
94428
10-19998
1144528
12-49770
13-48908
14391210
15-1033384
161520286
17-160228
18-6341134
1920818496
20-37590234
2126378436
2282578234
23-374832472
24813526830
25-912940820
26-677582846
276058167440
28-15935945034
2923495866004
30-4618822582
31-86184783880

[0,4,-14,32,6,-220,794,-1528,1038,4428,-19998,
 44528,-49770,-48908,391210,-1033384,1520286,
 -160228,-6341134,20818496,-37590234,26378436,
 82578234,-374832472,813526830,-912940820,
 -677582846,6058167440,-15935945034,23495866004,
 -4618822582,-86184783880]