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A213067 as a simple table

na(n)
00
1-1
2-2
344
41408
5-18016
6-5095232
7-139605376
856961507328
98306292414464
10-1178066937638912
11-640316054325354496
12-7088737339266301952
1376268423227563817631744
1418895160315230467816030208
15-12297988177132848140606242816

[0,-1,-2,44,1408,-18016,-5095232,-139605376,
 56961507328,8306292414464,-1178066937638912,
 -640316054325354496,-7088737339266301952,
 76268423227563817631744,
 18895160315230467816030208,
 -12297988177132848140606242816]