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A107657 as a simple table

na(n)
01
10
20
32184
444226
5530712
6-22289904
7-1041080040
8-23414482728
986664734520
1022704271546320
11824932708688088
1210338270616438674
13-363177176817506688
14-24534229526034608016
15-614775613733783853624
16-526997882017733986314
17591470477348411755418688
1824257417213770154760619728
19384176112414487265101313448

[1,0,0,2184,44226,530712,-22289904,-1041080040,
 -23414482728,86664734520,22704271546320,
 824932708688088,10338270616438674,
 -363177176817506688,-24534229526034608016,
 -614775613733783853624,-526997882017733986314,
 591470477348411755418688,
 24257417213770154760619728,
 384176112414487265101313448]