login

A055142 as a simple table

na(n)
01
10
2-2
3-8
4-36
5-224
6-1880
7-19872
8-251888
9-3712256
10-62286624
11-1171487360
12-24402416192
13-557542291968
14-13861636770176
15-372514645389824
16-10759590258589440
17-332386419622387712

[1,0,-2,-8,-36,-224,-1880,-19872,-251888,-3712256,
 -62286624,-1171487360,-24402416192,-557542291968,
 -13861636770176,-372514645389824,
 -10759590258589440,-332386419622387712]